Search Results: "math antics - scientific notation"

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03:29 Popular
Comparing Decimals Example 1 | Decimals | 4th Grade | Khan Academy

1,496 views / 1 likes - added 8 years ago

Learn how to compare decimals with tenths and hundredths. Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/cc-fourth-grade-math/cc-4th-decimals/cc-4th-compare-decimals/e/comparing_decimals_1?utm_source=YT&utm_me
01:18 Popular
Can You Make 4 Triangles From 6 Matches?

981 views / 0 likes - added 7 years ago

Can you use 6 matches to make 4 triangles of equal size and equal shape? This is harder than it sounds! Give it a try before watching the video for a solution. If you like my videos, you can support me at Patreon: http://www.patreon.com/mindyourdecisions
09:29 Popular
Dividing Decimals With Hundredths Example 3 | Decimals | Pre-Algebra | Khan Academy

1,082 views / 0 likes - added 8 years ago

The old saying is "practice makes perfect." Let's keep practicing dividing decimals and making our divisor a whole number. Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/pre-algebra/decimals-pre-alg/dividing-d
03:40 Popular
Comparing Decimals Visually Example | 4th Grade | Khan Academy

980 views / 0 likes - added 8 years ago

Learn how to compare decimals using grid diagrams. Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/cc-fourth-grade-math/cc-4th-decimals/cc-4th-compare-decimals-visually/e/comparing-decimals-visually?utm_source=
02:32 Popular
Comparing Fractions Visually With Pies | Fractions | 4th Grade | Khan Academy

1,044 views / 0 likes - added 8 years ago

Comparing fractions visually with pies Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/cc-fourth-grade-math/cc-4th-fractions-topic/cc-4th-comparing-fractions-visually/e/visually-comparing-fractions?utm_source=Y
02:27 Popular
Checking Ordered Pair Solutions To Equations Example 2 | Algebra I | Khan Academy

1,055 views / 0 likes - added 8 years ago

Second example of ordered pair solutions Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/algebra/two-var-linear-equations-and-intro-to-functions/solutions-to-two-var-linear-equations/e/plugging_in_values?utm_so
04:22 Popular
Impossible Algebra Problem

1,242 views / 0 likes - added 7 years ago

This problem is making the rounds. Can you place numbers in the four boxes so all the equations are true? Blog post (text/image explanation): http://wp.me/p6aMk-4up If you like my videos, you can support me at Patreon: http://www.patreon.com/mindyourdecis
10:31
How Close Are We to Zero-Emissions Electricity?

372 views / 0 likes - added 5 years ago

We know that tackling climate change will take quick and drastic action. Could modernizing our power grid be the key? How Close Are We? Season 3 - https://www.youtube.com/watch?v=Ypm4QcOOqXQ&list=PL6uC-XGZC7X56r8MGLS5rqsr5glQnMdAC Read More: The world has
02:55 Popular
Comparing Fractions On A Number Line | Fractions | 4th Grade | Khan Academy

1,450 views / 0 likes - added 8 years ago

Comparing fractions on a number line Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/cc-fourth-grade-math/cc-4th-fractions-topic/cc-4th-comparing-fractions-visually/e/visually-comparing-fractions?utm_source=YT&
02:35 Popular
Checking Ordered Pair Solutions To Equations Example 1 | Algebra I | Khan Academy

1,269 views / 0 likes - added 8 years ago

Checking ordered pair solutions to equations Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/algebra/two-var-linear-equations-and-intro-to-functions/solutions-to-two-var-linear-equations/e/plugging_in_values?ut
05:02 Popular
Positive And Negative Slope | Algebra I | Khan Academy

1,548 views / 0 likes - added 8 years ago

Positive and negative slope Watch the next lesson: https://www.khanacademy.org/math/algebra/two-var-linear-equations-and-intro-to-functions/slope/v/similar-triangles-to-prove-that-the-slope-is-constant-for-a-line?utm_source=YT&utm_medium=Desc&utm_campaign
06:30
Why people think they see ghosts

661 views / 0 likes - added 6 years ago

Even though there is no scientific evidence that ghosts exist, you may not be crazy if you see one. Subscribe to our channel! http://goo.gl/0bsAjO Vox.com is a news website that helps you cut through the noise and understand what's really driving the even
03:25 Popular
Can You Solve This? AA + BB + CC = ABC

2,482 views / 0 likes - added 7 years ago

If AA + BB + CC = ABC, what are the values of A, B, and C? All the digits are distinct and positive. Watch the video for a solution. Blog (text explanation): http://wp.me/p6aMk-4Cm If you like my videos, you can support me at Patreon: http://www.patreon.c
01:49 Popular
How To Find Two Function Inputs With The Same Output Given Graph (example) | Khan Academy

1,852 views / 0 likes - added 8 years ago

Sal finds the input value other than -5 for which f(x)=f(-5), given the graph of f. Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/algebra/algebra-functions/function-inputs-and-outputs/e/functions_matching_inp
04:08 Popular
Plotting Decimal Numbers On A Number Line (examples) | Khan Academy

913 views / 0 likes - added 8 years ago

Learn how to find decimals with hundredths on a number line. Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/cc-fourth-grade-math/cc-4th-decimals/cc-4th-decimals-number-line/e/decimals_on_the_number_line_2?utm_
04:25 Popular
Multiplying Challenging Decimals | Decimals | Pre-Algebra | Khan Academy

965 views / 0 likes - added 8 years ago

Sometimes multiplying really small decimals (with all those zeros!) can be a little intimidating. Watch as we show you a handy trick to simplify these problems and solve them. Practice this lesson yourself on KhanAcademy.org right now: https://www.khanaca
03:33 Popular
Finding A Percentage | Decimals | Pre-Algebra | Khan Academy

1,258 views / 0 likes - added 8 years ago

Once again, fractions are our friends as we use them to find a percentage. You'll also see a couple of different ways to arrive at the answer. Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/pre-algebra/decimal
07:11 Popular
Graphing Solutions To Two-variable Linear Equations Example 2 | Algebra I | Khan Academy

2,048 views / 0 likes - added 8 years ago

Graphing solutions to 2 variable linear equations Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/algebra/two-var-linear-equations-and-intro-to-functions/solutions-to-two-var-linear-equations/e/graphing-solutio
03:06 Popular
Decimal Intuition With Grids (examples) | Decimals | 4th Grade | Khan Academy

1,258 views / 0 likes - added 8 years ago

Deepen your understanding of decimal numbers by thinking about grid diagrams. Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/cc-fourth-grade-math/cc-4th-decimals/cc-4th-decimals-intro/e/decimal-intuition-with-
08:30 Popular
Multiplying And Dividing Negative Numbers | Pre-Algebra | Khan Academy

1,841 views / 0 likes - added 8 years ago

Multiplying and dividing negative numbers Watch the next lesson: https://www.khanacademy.org/math/arithmetic/absolute-value/abs_value_tutorial/v/absolute-value-and-number-lines?utm_source=YT&utm_medium=Desc&utm_campaign=PreAlgebra Missed the previous less
04:24 Popular
Marathon Chemistry: The Science of Distance Running

770 views / 0 likes - added 7 years ago

Subscribe! http://bit.ly/ACSReactions Marathons are tough. Athletes push their bodies for miles and deal with cramping, dehydration and every runner’s worst fear: that extreme form of fatigue called “hitting the wall.” Why is distance running so difficult
05:05 Popular
Solving Ratio Problems With Tables Example 1 | Pre-Algebra | Khan Academy

887 views / 0 likes - added 8 years ago

We're displaying ratios in a table format here, and then asking: given a ratio, solve for equivalent ratios. Here are a few examples to practice on. Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/pre-algebra/r
06:55 Popular
Place Value For Decimals Greater Than One (examples) | 4th Grade | Khan Academy

1,172 views / 1 likes - added 8 years ago

Understand decimal numbers that are greater than 1. Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/cc-fourth-grade-math/cc-4th-decimals/cc-4th-decimals-greater-than-one/e/decimals-greater-than-one-intuition?ut
03:08 Popular
Multiplying Unit Fractions And Whole Numbers | Fractions | Pre-Algebra | Khan Academy

1,667 views / 1 likes - added 8 years ago

Don't let multiplying whole numbers and fractions get you down. We got this. This explanation will help you become a pro. Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/pre-algebra/fractions-pre-alg/multiplyin
04:16 Popular
Least Common Multiple Exercise | Factors And Multiples | Pre-Algebra | Khan Academy

1,142 views / 0 likes - added 8 years ago

We're practicing finding the least common multiple in these example exercises. We'll teach you the prime factorization approach which is a pretty nifty way to find the lcm (least common multiple). Practice this lesson yourself on KhanAcademy.org right now
05:30 Popular
Graphing Linear Functions Example 1 | Algebra I | Khan Academy

1,874 views / 0 likes - added 8 years ago

Learn how graph a linear function. This video gives an example of graphing fuel consumption as a function of distance. Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/algebra/two-var-linear-equations-and-intro-
09:17 Popular
Unit Conversion Within The Metric System | Pre-Algebra | Khan Academy

1,880 views / 0 likes - added 8 years ago

Metric unit conversion Watch the next lesson: https://www.khanacademy.org/math/pre-algebra/rates-and-ratios/metric-system-tutorial/v/converting-within-the-metric-system?utm_source=YT&utm_medium=Desc&utm_campaign=PreAlgebra Missed the previous lesson? http
13:43 Popular
IIT JEE Complex Root Probability (part 1)

710 views / 0 likes - added 9 years ago

2010 Paper 1 problem 31 Math (part 1) More free lessons at: http://www.khanacademy.org/video?v=bV_HSZ_W0nk
07:08 Popular
Early Train Word Problem | Linear Equations | Algebra I | Khan Academy

885 views / 0 likes - added 8 years ago

Fun word problem that is almost a brain teaser. Watch the next lesson: https://www.khanacademy.org/math/algebra/solving-linear-equations-and-inequalities/More-equation-practice/v/patterns-in-sequences-1?utm_source=YT&utm_medium=Desc&utm_campaign=AlgebraI
01:34 Popular
Solving Ratio Problems With Graph | Pre-Algebra | Khan Academy

1,940 views / 0 likes - added 8 years ago

In this example we'll plot points on the x and y axis to reflect the given ratios. Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/pre-algebra/rates-and-ratios/ratios_and_proportions/e/solving-ratio-problems-wi
08:21 Popular
Two-variable Linear Equations And Their Graphs | Algebra I | Khan Academy

2,051 views / 0 likes - added 8 years ago

Introduction to 2-variable linear equations and their graphs Watch the next lesson: https://www.khanacademy.org/math/algebra/two-var-linear-equations-and-intro-to-functions/solutions-to-two-var-linear-equations/v/checking-ordered-pair-solutions-to-equatio
02:36 Popular
Converting Decimals To Percents | Decimals | Pre-Algebra | Khan Academy

1,526 views / 0 likes - added 8 years ago

Need to convert a decimal to a percent? Ok, we'll just use our fraction friends to get us there. Watch and be amazed. Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/pre-algebra/decimals-pre-alg/percent-intro-p
04:37 Popular
Fraction-decimal Intuition Problems (examples) | 4th Grade | Khan Academy

1,035 views / 0 likes - added 8 years ago

Understand the connection between decimals and fractions using a grid diagram. Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/cc-fourth-grade-math/cc-4th-decimals/cc-4th-decimal-fractions/e/fraction-decimal-in
06:20 Popular
Greatest Common Factor Explained | Factors And Multiples | Pre-Algebra | Khan Academy

1,181 views / 0 likes - added 8 years ago

Here's a nice explanation of least common factor (or least common divisor) along with a few practice example exercises. Let's roll. Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/pre-algebra/factors-multiples/
07:40 Popular
Comparing Numbers Represented In Different Ways | 4th Grade | Khan Academy

746 views / 0 likes - added 8 years ago

Examples of Khan Academy practice problems where you compare decimals, fractions, and number diagrams. Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/cc-fourth-grade-math/cc-4th-decimals/cc-4th-compare-decimal
04:42
How Warren Buffett Tried To Trick Bill Gates In A Dice Game

686 views / 0 likes - added 7 years ago

Warren Buffett once challenged Bill Gates to a dice game similar to this one. How would you play the game? Blog post (text explanation) http://wp.me/p6aMk-4ro Source The dice numbers and the story are described at Microsoft Research's website for non-tran
05:48
What Is The Area? "You Should Be Able To Solve This"

508 views / 0 likes - added 5 years ago

Thanks to Reio in Romania for emailing me this fun problem! What is the area? This puzzle was shared with the tagline "you should be able to solve this." Solution to 5th grade Chinese challenge problem https://youtu.be/OuJQaxZvlYs My blog post for this vi
05:07 Popular
Earth's Little Garbage People?

731 views / 0 likes - added 7 years ago

Subscribe! http://bit.ly/ACSReactions How do earthworms eat? If you’re enjoying some tasty food today that has at least one ingredient that was farmed somewhere, you probably owe a little thanks to earthworms. How is it that these detritivores – literally
09:56
Challenging Perimeter Problem

558 views / 0 likes - added 9 years ago

Perimeter of rectangle covered by 9 non-overlapping squares. From 200) American Invitational Math Exam More free lessons at: http://www.khanacademy.org/video?v=1uWZNW5PF-s
10:09
Y CN U R34D DIS?

503 views / 0 likes - added 5 years ago

The video we did over on Mark's channel! https://youtu.be/VF5MGLRlXVw Subscribe to Mark's channel Alliterative! https://www.youtube.com/user/Alliterative Hi! I'm Jade. Subscribe to Up and Atom for new physics, math and computer science videos every second
04:24 Popular
Example Of Subtracting Fractions With Unlike Denominators | Fractions | Pre-Algebra | Khan Academy

1,657 views / 0 likes - added 8 years ago

If you conquered adding fractions with different denominators, then subtracting fractions will be a snap. Don't worry...we'll take it slow and explain every step. Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math
02:35 Popular
Dividing Whole Numbers And Fractions: Studying | Fractions | Pre-Algebra | Khan Academy

2,106 views / 0 likes - added 8 years ago

Solve a word problem by dividing a fraction by a whole number. The example used in this video is 1/5 ÷ 4. Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/pre-algebra/fractions-pre-alg/dividing-fractions-pre-alg
03:00 Popular
Inverse Property Of Addition | Arithmetic Properties | Pre-Algebra | Khan Academy

1,789 views / 0 likes - added 8 years ago

The simple idea that a number plus its negative is 0 Watch the next lesson: https://www.khanacademy.org/math/pre-algebra/order-of-operations/arithmetic_properties/v/inverse-property-of-multiplication?utm_source=YT&utm_medium=Desc&utm_campaign=PreAlgebra M
02:35 Popular
Comparing Fractions Visually With A Bar | Fractions | 4th Grade | Khan Academy

1,110 views / 0 likes - added 8 years ago

Learn how to compare fractions with unlike denominators by drawing bars Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/cc-fourth-grade-math/cc-4th-fractions-topic/cc-4th-comparing-fractions-visually/e/visually
07:51 Popular
Volume: How To Measure It | Measurement | Pre-Algebra | Khan Academy

786 views / 0 likes - added 8 years ago

Volume is a measurement in the 3rd dimension. This means that it not only has width and height, but it has depth as well. Let's watch this video in which we get a great explanation of how we measure volume. Practice this lesson yourself on KhanAcademy.org
08:34 Popular
LCM And GCF Word Problems | Factors And Multiples | Pre-Algebra | Khan Academy

1,856 views / 1 likes - added 8 years ago

Here we have a couple of word problems--one searching for the least common multiple and the other for the greatest common factor. Just read them with us slowly and follow along. You'll get it. Practice this lesson yourself on KhanAcademy.org right now: ht
03:45 Popular
Visualizing Equivalent Fractions | Fractions | Pre-Algebra | Khan Academy

1,097 views / 0 likes - added 8 years ago

To understand equivalent fractions it helps to "see" the fractions using something like a grid with shaded and unshaded sections representing the fraction. Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/pre-al
04:33 Popular
Can you solve Zeno's paradox? - Brain Teaser

1,631 views / 0 likes - added 7 years ago

Zeno's paradox is one of the most well know math puzzles in history. Is it possible to add an infinite amount of numbers and get an exact value? This is one example of Zeno's paradox. Try and solve this paradox and learn about the Greek philosopher Zeno i
02:32 Popular
Dividing Whole Numbers And Fractions: Potpourri | Fractions | Pre-Algebra | Khan Academy

1,782 views / 0 likes - added 8 years ago

Solve a word problem by dividing a whole number by a fraction. The example used in this video is 4 ÷ 1/5. Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/pre-algebra/fractions-pre-alg/dividing-fractions-pre-alg
05:15 Popular
Machine Learning Explained

958 views / 0 likes - added 6 years ago

Machine learning explained simply. In this video you'll learn what exactly machine learning is and machine learning basics. No knowledge of machine learning required to watch this video. Hi! I'm Jade. Subscribe to Up and Atom for new physics, math and com
02:53
Travel Deep Inside a Leaf | California Academy of Sciences

472 views / 1 likes - added 5 years ago

Take a journey inside a leaf of a redwood tree. Enter the stoma and view photosynthesis on a molecular level, knowing that the animation prioritizes scientific accuracy. Educators might also be interested in an annotated version of this video: https://you
04:11 Popular
Decomposing Hundredths Into Tenths And Hundredths | 4th Grade | Khan Academy

1,481 views / 0 likes - added 8 years ago

Learn how to decompose a fraction into tenths and hundredths. Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/cc-fourth-grade-math/cc-4th-fractions-topic/cc-4th-fractions-unlike-denom/e/decompose-fractions-with
02:49 Popular
Percent Word Problem Example 2 | Decimals | Pre-Algebra | Khan Academy

1,182 views / 0 likes - added 8 years ago

It's nice to practice conversion problems, but how about applying our new knowledge of percentages to a real life problem like recycling? Hint: don't forget your long division! Practice this lesson yourself on KhanAcademy.org right now: https://www.khanac
06:17 Popular
Solving Percent Problems | Decimals | Pre-Algebra | Khan Academy

889 views / 0 likes - added 8 years ago

We'll use algebra to solve this percent problem. Watch the next lesson: https://www.khanacademy.org/math/pre-algebra/decimals-pre-alg/percent-word-probs-pre-alg/v/solving-percent-problems-2?utm_source=YT&utm_medium=Desc&utm_campaign=PreAlgebra Missed the
01:47 Popular
Decompose Hundredths On Number Line | Fractions | 4th Grade | Khan Academy

1,578 views / 0 likes - added 8 years ago

Learn how to decompose a fraction with hundredths on a number line. Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/cc-fourth-grade-math/cc-4th-fractions-topic/cc-4th-fractions-unlike-denom/e/decompose-fraction
23:08 Popular
A Rare Interview With The Mathematician Who Cracked Wall Street | Jim Simons | TED Talks

875 views / 0 likes - added 8 years ago

Jim Simons was a mathematician and cryptographer who realized: the complex math he used to break codes could help explain patterns in the world of finance. Billions later, he’s working to support the next generation of math teachers and scholars. TED’s Ch
07:07 Popular
How Many Sides Does A Circle Have?

943 views / 0 likes - added 3 years ago

Watch my newest video, "Could a Toothpaste Sandwich Brush Your Teeth?": https://youtu.be/OdeiWhETqQYYou probably think you know a circle. Maybe youve even thought a little bit about what a circle is and what a circle isnt. But do you know how many sides a
03:35
Why Do We Gain Fat? with Eugenia Cheng

316 views / 0 likes - added 3 years ago

In this short clip from her talk 'How To Think Like A Mathematician', Eugenia Cheng explains how a whole web of interconnected factors cause us to gain fat. Watch the full talk: https://youtu.be/8emPcpfqPRUEugenia's book "The Art of Logic" is available no
10:18
Asthma Preventing Microbes, Pollinator Plant Preference, and More: 60 Second Science Podcasts

640 views / 0 likes - added 7 years ago

Listen and learn about the microbes that may lower children's risk of having asthma, why an early flower bloom might be a sign of low biodiversity, how pollinators shape plant evolution, how treating disease might involve treating poverty, and how the gut
06:06 Popular
Equivalent Fractions And Different Wholes | Fractions | 4th Grade | Khan Academy

810 views / 0 likes - added 8 years ago

Learn how two fractions are equivalent only if they refer to the same whole. For example, 1/2 of a small circle is not the same as 1/2 of a big circle. Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/cc-fourth-
06:24 Popular
The Seemingly Impossible Escape Logic Puzzle

1,453 views / 0 likes - added 7 years ago

An evil logician takes Alice and Bob captive. They have a chance to escape if they can deduce the total number of trees in the prison. Can they figure it out? Source of puzzle wu: riddles forum https://www.ocf.berkeley.edu/~wwu/cgi-bin/yabb/YaBB.cgi?board
05:35 Popular
Long Division of Numbers - Arithmetic Basics, Ex 1

2,064 views / 0 likes - added 8 years ago

Need a LIVE tutor to help answer a question? Check out the people at http://www.tutor.com/signup?AdDist=1&ExAdId=90fddaff-89aa-4a4f-91da-90841e168246&TDC_OfferCode=e2bf363b-0cb8-4635-98c3-2b5211d0847a&subject=math&grade=undefined for a FRE
04:20 Popular
Visually Converting From Tenths To Hundredths | 4th Grade | Khan Academy

1,190 views / 0 likes - added 8 years ago

Learn how to convert fractions from tenths to hundredths using grid diagrams. Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/cc-fourth-grade-math/cc-4th-fractions-topic/cc-4th-fractions-unlike-denom/e/equivale
05:52 Popular
Can You Solve The "MEANEST" SAT Test Question Ever?

704 views / 0 likes - added 5 years ago

On the SAT exam, you have about 2 minutes to read and solve each math question. This one about averages can send you in a loop, unless you approach it systematically. In the video I also explain a shortcut to help you solve this type of problem quickly. S
04:07 Popular
Adding And Subtracting Negative Numbers | Pre-Algebra | Khan Academy

1,338 views / 0 likes - added 8 years ago

Learn how to add and subtract negative numbers. The problems solved in this video are 2 - 3 = -1 and -2 - 3 = -5 and -2 + 3 = 1 and 2 - (-3) = 5 and -2 - (-3). Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/pr
06:24 Popular
Can You Solve The Chameleon Riddle?

1,010 views / 0 likes - added 7 years ago

A museum has 13 blue, 15 red, and 17 green chameleons. Whenever two chameleons of different colors meet, they both change into the color of the other chameleon (if blue and red met, for example, they would both turn green). As the chameleons mingle, is it
09:36 Popular
Negative Numbers Introduction | Negative Numbers And Absolute Value | Pre-Algebra | Khan Academy

2,221 views / 0 likes - added 8 years ago

Mysterious negative numbers! What ARE they? They are numbers less than zero. If you understand the nature of below zero temperatures, you can understand negative numbers. We'll help. Practice this lesson yourself on KhanAcademy.org right now: https://www.
How Rattlesnakes Scales Help Them Sip Rainwater From Their Bodies | Headline Science

216 views / 0 likes - added 2 years ago

Researchers reporting in ACS Omega have investigated how the scales of some desert rattlesnakes help them harvest rain during thunderstorms. ACS Headline Science reveals the secrets of the snakes scales. Role of Scale Wettability on Rain-Harvesting Behavi
08:08 Popular
Are Force Fields Possible?

713 views / 0 likes - added 6 years ago

You know the awesomely powerful force fields you see in the movies? Why don't they exist in real life? Are they physically possible? Come find out. Hi! I'm Jade. I'm an Aussie with a Bachelor's degree in Applied Physics. After three years and over 100 lab
09:16 Popular
Adding/subtracting Negative Numbers | Pre-Algebra | Khan Academy

1,356 views / 0 likes - added 8 years ago

Adding and subtracting negative numbers Watch the next lesson: https://www.khanacademy.org/math/pre-algebra/negatives-absolute-value-pre-alg/mult-div-negatives-pre-alg/v/multiplying-positive-and-negative-numbers?utm_source=YT&utm_medium=Desc&utm_campaign=
07:52 Popular
Find The 10 Digit Number Classic Puzzle And Solution

890 views / 0 likes - added 7 years ago

I'm thinking of a 10 digit number that uses the each digit 0 to 9 exactly once and where the number formed by the first n digits is divisible by n. What could my number be? The video explains how to find the answer using tests for divisibility. Blog post:
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Multiply Numbers By Drawing Lines

623 views / 0 likes - added 6 years ago

Gow to multiply numbers by drawing lines. Get the Multiply By Lines Book! https://www.amazon.com/gp/product/1500866148/ If you like my videos, you can support me at Patreon: http://www.patreon.com/mindyourdecisions Connect on social media. I update each s
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10:20 Popular
SURPRISING Coin Flipping Probability - Flips To HH Versus HT

876 views / 0 likes - added 7 years ago

What is the expected number of coin flips until you get two heads in a row (HH)? What is the expected number of coin flips until you get a heads followed by a tails (HT)? The video presents the solution and an intuitive explanation for this probability ri
04:21
Introduction To The SAT Reading Test | Tips & Planning | New SAT | Khan Academy

613 views / 0 likes - added 8 years ago

Watch the next lesson: https://www.khanacademy.org/test-prep/new-sat/new-sat-tips-planning/new-sat-about-sat/v/sat-writing-test-intro?utm_source=YT&utm_medium=Desc&utm_campaign=NewSAT Missed the previous lesson? https://www.khanacademy.org/test-prep/new-s
04:13 Popular
Adults Stumped By Geometry Problems For 10 Year Olds. Can You Solve Them?

845 views / 0 likes - added 7 years ago

These homework problems were given to 10 year old children (Year 5) in England (Glossop, Derbyshire) and they were posted to Facebook when some adults found them to be difficult. One person claimed the problems were impossible to solve. Can you figure the
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TOUGH Interview Question - Ways To Give 11 Coins To 3 People

610 views / 0 likes - added 7 years ago

How many ways can you divide 11 coins to 3 people? How many ways are there if each person has to get at least 1 coin? This puzzle is an example of a technical interview question. The video demonstrates the solution, which indicates the number of non-negat
13:17 Popular
Probability that at least 2 people in a room of 30 share the same birthday | Probability and Statist

982 views / 0 likes - added 6 years ago

The probability that at least 2 people in a room of 30 share the same birthday. Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/probability/probability-and-combinatorics-topic/probability_combinatorics/e/probab
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The Paradox Paradox

497 views / 1 likes - added 5 years ago

Get quarterly deliveries of our favorite science and math toys! https://www.curiositybox.com/ Support Vsauce3 and get EARLY ACCESS to videos: https://www.youtube.com/channel/UCwmFOfFuvRPI112vR5DNnrA/join My Other Paradox Videos: 3 Time Travel Paradoxes!:
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The Riddle That Seems Impossible Even If You Know The Answer

183 views / 0 likes - added 1 year ago

The 100 Prisoners Riddle feels completely impossible even once you know the answer. This video is sponsored by Brilliant. The first 200 people to sign up via https://brilliant.org/veritasium get 20% off a yearly subscription.Special thanks to Destin of Sm
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Can You Solve A 5th Grade Problem From China? Find The Area Of ABCD

792 views / 0 likes - added 5 years ago

Thanks to Eric from Miami for suggesting this problem and sending a solution! The diagram shows a quadrilateral ABCD with the values for some angles and the length of AB. Can you figure out the area of ABCD? Subscribe: https://www.youtube.com/user/MindYou
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Six science lessons for the next US president

486 views / 1 likes - added 7 years ago

Election campaigns tend to slight science. But once a new president is in office, technical issues have a way of demanding attention. Here's a quick rundown of the scientific challenges the next POTUS might face. Learn more: http://bit.ly/2dt5b6h JOIN AAA
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Content Changes To The New SAT | Tips & Planning | New SAT | Khan Academy

647 views / 0 likes - added 9 years ago

Sal covers the major content changes to the new SAT. Watch the next lesson: https://www.khanacademy.org/test-prep/new-sat/new-sat-tips-planning/new-sat-about-sat/v/sat-math-test-intro?utm_source=YT&utm_medium=Desc&utm_campaign=NewSAT Missed the previous l
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How to Measure Wavelength of Light with a Meter Stick - The Science of Light with Mr. G - Part 2

1,247 views / 0 likes - added 5 years ago

**WARNING: This video contains math. Math has been known to cause great anxiety and even scare people. Please watch this video at your own risk. Or, just be brave and learn something new today! ~Craig Beals and Glenn Govertsen from the Mr. G Science Show
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Could These Numbers Unravel New Dimensions in Space?

406 views / 1 likes - added 5 years ago

These multidimensional number systems are helping us explain the laws of nature. Here’s how. Can Hawking’s Black Hole Paradox Be Solved With Fuzzballs? - https://youtu.be/esPa1tVSjew Read More: The Peculiar Math That Could Underlie The Laws of Nature http
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Animation of SARS-CoV-2 entry into human host-cell.

188 views / 0 likes - added 2 years ago

How does the Coronavirus enter a human cell to insert the viral-RNA into the host? Which mechanism makes this possible? This animation bei Janet Iwasa in cooperation with the Coronavirus structural taskforce gives an insight to this interesting yet comple
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Percentage Of A Whole Number | Decimals | Pre-Algebra | Khan Academy

1,530 views / 0 likes - added 8 years ago

We hope you're beginning to see that there's more than one way to skin a cat. In other words, there are several different ways to solve problems involving percentages, decimals, and fractions. Watch as find the percentage of a whole number. Watch the next
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Noble Gas Configuration | Electronic Structure Of Atoms | Chemistry | Khan Academy

1,490 views / 0 likes - added 8 years ago

How to write electron configurations for atoms and monatomic ions using noble gas configuration Chemistry on Khan Academy: Did you know that everything is made out of chemicals? Chemistry is the study of matter: its composition, properties, and reactivity
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Noble gas configuration

781 views / 0 likes - added 6 years ago

How to write electron configurations for atoms and monatomic ions using noble gas configuration Chemistry on Khan Academy: Did you know that everything is made out of chemicals? Chemistry is the study of matter: its composition, properties, and reactivity
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What is a Force?

616 views / 1 likes - added 3 years ago

Force is a central concept in physics. By analysing the forces on an object, its resulting motion can be determined. But what exactly is a force? The word force is used in everyday language in a variety of contexts, only some of which reflect the scientif
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Can You Solve The 3 Cards Riddle?

681 views / 0 likes - added 7 years ago

There are 3 cards in this problem. One card is blue on both sides, another is red on both sides, and the last is red on one side and blue on the other. The cards are put in a bag and I pick one at random. Without looking at the colors on the card, I place
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Dimensional Analysis 3: Examples and Practice for Converting Units

429 views / 0 likes - added 5 years ago

Craig Beals continues his explanation of dimensional analysis with some simple practice problems. Dimensional analysis is one of the most important science-math topics because it is usable in every aspect of science.
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How Logical Are You? The Irrationality Illusion Tricks Most

805 views / 0 likes - added 7 years ago

This video relates a cognitive bias ("irrational" decision) to an optical illusion (picture at 1:45). For more, check out my new book, "The Irrationality Illusion: How to Make Smart Decisions And Overcome Bias" http://amzn.to/1o3FaAg Blog post (text and i
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What Is Gravity?

390 views / 0 likes - added 3 years ago

People have a lot of different ideas about what gravity is: a downward force that stops you from flying off into space, an attraction smaller objects experience towards larger objects, or a mutual attraction between all masses. It is the last of these ide
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The 50/50 Problem You Won't Believe

205 views / 0 likes - added 2 years ago

Get the Vsauce Curiosity Box: https://www.curiositybox.com/vsauce2Probability is one of the clearest, more straightforward disciplines within mathematics. Unfortunately, almost nothing in mathematics is murkier and more misleading than probability. WHAT?!
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Calculus Limits - Factoring Example

1,430 views / 0 likes - added 7 years ago

Learning Calculus limits is a breeze with this tutorial and video example.. This example teaches you how to solve limits by factoring. Check out my Calculus limits playlist if you want some harder examples. I also offer live tutoring if you need any extra
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Calculus Limits - Easy Problem and Introduction

1,257 views / 0 likes - added 7 years ago

Learning Calculus limits is a breeze with this problem and introduction. This example is an easy problem. Check out my Calculus limits playlist if you want some harder examples. I also offer live tutoring if you need any extra help. Check out my website i
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Sesame Street: "Elmo the Musical" Preview

888 views / 0 likes - added 9 years ago

Elmo stars in his very own musical, using his math skills to solve problems and save the day. Kids can sing, dance, play, and imagine along with Elmo on these math-filled adventures. You can find the Elmo the Musical DVD here: http://store.sesamestreet.or
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How to Divide Fractions

882 views / 0 likes - added 5 years ago

Watch more Basic Math Skills videos: http://www.howcast.com/videos/262765-How-to-Divide-Fractions Math can be scary, but don't give up. Follow these simple steps, and soon you'll be dividing fractions like a pro. Step 1: Write the problem Write out the fi
02:45 Popular
The Day After Tomorrow Is Yesterday Riddle. Can You Solve It?

707 views / 0 likes - added 7 years ago

This puzzle is popular on Facebook and many other sites. "When the day after tomorrow is yesterday, then today will be as far from Wednesday as today was from Wednesday when the day before yesterday was tomorrow. What day is today?" Can you solve this tri
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Is this the Farm of the Future?

671 views / 1 likes - added 7 years ago

Subscribe! http://bit.ly/ACSReactions For more on vertical farming, check out this article from ChemMatters: http://bit.ly/verticalfarmingchem There’s a new trend in agriculture called vertical farming. As humans learned to farm, we arranged plants outsid
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08:39
Frog Jumping - Numberphile

635 views / 0 likes - added 5 years ago

Featuring Gordon Hamilton from Math Pickle. More links below. Numberphile T-Shirts: https://teespring.com/stores/numberphile Gordon and the Mondrian Art Problem: https://youtu.be/49KvZrioFB0 Math Pickle (Gordon's website): http://mathpickle.com Numberphil
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Can You Solve This Intelligence Test? Viral Facebook Puzzle

743 views / 0 likes - added 7 years ago

If 6 + 4 = 210, and 9 + 2 = 711, what is the rule to combine numbers? This "intelligence test" has been shared more than 3 million times on Facebook. On Twitter people claim solving it means you have an IQ of more than 150 (genius level). In this video I
02:58
A new species? The Vogelkop Superb Bird-of-Paradise

626 views / 0 likes - added 6 years ago

Sometimes a new species is hiding in plain sight...meet the Vogelkop Superb Bird-of-Paradise. Learn more about how the distinct song, dance and courtship appearance of the Vogelkop Superb Bird-of-Paradise confirms its new species status in our scientific
Mushroom Canoe | The String Machine and More | Nebraska Stories | Nebraska Public Media

78 views / 0 likes - added 9 months ago

Katy Ayers didn't build her canoe, she grew it from mushrooms! Katy's interest in mycology (the scientific study of fungi) inspired her to research mushroom roots and how they could help the environment. It only took 14 days to grow her 8-foot boat and ev
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Can You Solve A Puzzle That Fooled Richard Feynman?

711 views / 0 likes - added 5 years ago

What is the radius of the circle, in simplest terms involving a, b, and c? I read that even the great mind Richard Feynman made a mistake. Watch the video to learn the common mistake and what the correct answer is. Source Feynman story http://web.media.mi
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Can You Solve The Snake Eyes Probability Riddle?

844 views / 0 likes - added 7 years ago

You close your eyes and roll a pair of dice. The casino dealer announces that at least one of the rolls is showing a 1.What is the probability that both dice are showing a 1? Watch the video for the solution. (Snake eyes is a term for rolling a pair of 1s
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The story behind your glasses - Eva Timothy

384 views / 0 likes - added 6 years ago

View full lesson: http://ed.ted.com/lessons/the-story-behind-your-glasses-eva-timothy What scientific thinkers and achievements have led to vast improvements in optics over the centuries? Discover the fascinating ways that our understanding of light infor
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$250,000 for a High School Science Student

448 views / 0 likes - added 5 years ago

The story of three impressive high school science projects. Can you guess which student won $250,000 in the #RegeneronSTS? Applications open June 1: http://bit.ly/2HkLXT1 This video was sponsored by Regeneron. The Science Talent Search was founded and pro
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How to See Quantum with the Naked Eye

555 views / 0 likes - added 6 years ago

How can you train yourself to be a quantum detector? Quantum interactions happen at impossibly small scales. But the life-size effects are all around you. You can detect quantum mechanics all over — if you know how to look for it. Subscribe: https://www.y
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Will You Survive the Zombie Apocalypse?! | NUMBER CRUSHERS

829 views / 1 likes - added 5 years ago

Will You Survive the Zombie Apocalypse?! Math-Wiz Izzy challenges you to solve this undead brain teaser! Will Jon wake up before the Zombie strikes? Will Gary sink into quicksand before his friend can save him? Take a guess or do the math to know what hap
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15 Mysterious Objects That Science Can't Explain!

543 views / 1 likes - added 3 years ago

Scientific advances allow us to research and understand most things that we find in the world, but there are some that remain a complete mystery. Some are natural phenomena, but more bizarrely, there are a number of items that were created by humans throu
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The Game That Learns

635 views / 0 likes - added 4 years ago

Watch my newest video, "The Game You Win By Losing (Parrondo's Paradox)": https://youtu.be/PpvboBJEozMInstall Raid for Free IOS: http://bit.ly/2HtjCLc ANDROID: http://bit.ly/2Th4NgaGet 50k silver immediately and a free Epic Champion as part of the new pla
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When Is Christmas? Mentally Convert Date To Day Of The Week

531 views / 0 likes - added 7 years ago

January 1, 2016 is a Friday. When will Christmas be in 2016? What about Christmas in 2055? You can do this in your head! Blog post (text explanation): http://wp.me/p6aMk-4qQ Doomsday Rule (previous video): https://www.youtube.com/watch?v=UsStBxY9STw Calcu
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The most significant genius: Emmy Noether

340 views / 0 likes - added 5 years ago

There are a few people in the history of physics who have made insights that have revolutionized our understanding of the interactions of math and physics and given us real insights into the meaning of our theories. In this video, Fermilab’s Dr. Don Linco
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Base Neutral Multiplication

326 views / 0 likes - added 3 years ago

Math enthusiast Baron Hansz has described an terrific way to perform long multiplication in any base you like -- even fractional ones -- with absolute ease! He brilliantly combines the area model with Exploding Dots thinking. This video bounces of his vid
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Meet The Prepositions | Prepositions | The Parts Of Speech | Grammar

1,060 views / 1 likes - added 8 years ago

Prepositions help show us where things are in space and time. Practice this yourself on Khan Academy right now: http://www.khanacademy.org/the-preposition/e/meet-the-preposition Watch the next lesson: https://www.youtube.com/watch?v=96sojEZsKu8 The parts
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The Numbers in Dice Stacking and Balancing

505 views / 1 likes - added 7 years ago

Behold the 120-sided dice, the d120: http://thedicelab.com/d120.html Of course, the d120 is available on Maths Gear! https://mathsgear.co.uk/products/d120-dice Here is the numerically balanced d20 as well. https://mathsgear.co.uk/products/numerically-bala
56:43 Popular
Wild Thing: The Smithsonian National Zoo

959 views / 2 likes - added 9 years ago

As part of its mission to "advance research and scientific knowledge in conserving wildlife and to teach and inspire people to protect wildlife, natural resources, and habitats," scientists at the National Zoo breed endangered species for the purpose of r
08:49
Transistors & The End of Moore's Law

499 views / 0 likes - added 8 years ago

How does a transistor work? And when will Moore's Law break down? Supported by TechNYou - check out their great series on the scientific method: http://bit.ly/19bBX5G Thanks to A/Prof Morello and UNSW. Find out more here: http://bit.ly/17wZ7lt
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Why Is Glass Transparent? - Mark Miodownik

549 views / 0 likes - added 8 years ago

View full lesson: http://ed.ted.com/lessons/why-is-glass-transparent-mark-miodownik If you look through your glasses, binoculars or a window, you see the world on the other side. How is it that something so solid can be so invisible? Mark Miodownik melts
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Can You Survive the Grasp of King Kong? | NUMBER CRUSHERS

650 views / 0 likes - added 5 years ago

Can You Survive the Grasp of King Kong? Number Pro Izzy challenges you to solve this larger-than-life math problem! Will Jon wake up before the Zombie strikes? Will Gary sink into quicksand before his friend can save him? Take a guess or do the math to kn
08:05 Popular
Can You Solve The Hardest Easy Geometry Problem?

1,273 views / 1 likes - added 7 years ago

In the figure, what is the value of angle x? This problem is known as Langley's Adventitious Angles. It is also known as the hardest easy geometry problem because it can be solved by elementary methods but it is notoriously difficult to work out. Can you
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Intensifiers And Adverbs Of Degree | Modifiers | The Parts Of Speech

998 views / 0 likes - added 8 years ago

Words like 'very' and 'slightly' are examples of intensifiers and adverbs of degree. Here's how they work! Practice this yourself on Khan Academy right now: https://www.khanacademy.org/humanities/grammar/partsofspeech/the-modifier/e/intensifiers-and-adver
07:45 Popular
Introduction to chemistry

812 views / 0 likes - added 6 years ago

A big picture intro to chemistry and why it is fascinating. Chemistry on Khan Academy: Did you know that everything is made out of chemicals? Chemistry is the study of matter: its composition, properties, and reactivity. This material roughly covers a fir
01:51 Popular
Crossing The River - Brain Teaser

931 views / 0 likes - added 8 years ago

Try to solve this fun brain teaser. Cross the river with all of the zombies and humans. The boat can only fit two at a time. Also there can never be more zombies than humans. My name is Chris and my passion is to teach math. Learning should never be a str
03:16 Popular
Can You Solve This 8th Grade Geometry Problem? 75% Got The Wrong Answer

1,003 views / 0 likes - added 7 years ago

What is angle A in the star-shaped figure? This problem appeared on the 1999 AMC 8 test (intended for 8th grade students in the US). Approximately 75% of test-takers did not mark the correct response. Can you figure it out? Watch the video for a solution.
09:47 Popular
Tides: Crash Course Astronomy #8

1,100 views / 1 likes - added 9 years ago

Today Phil explores the world of tides! What is the relationship between tides and gravity? How do planets and their moons become tidally locked? What would happen if you were 300km tall? Important questions. -- Gravity Over Distance 0:44 Tidal Force Para
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How does a Refrigerator work ?

1,116 views / 1 likes - added 6 years ago

Have you ever wondered how the refrigerators in your home work? Refrigerators, which have become an integral part of every household, work based on some simple and interesting scientific principles. Beginning with a basic refrigerator model, this video wi
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Introduction To Partial Pressure | Gases And Kinetic Molecular Theory | Chemistry | Khan Academy

1,638 views / 0 likes - added 8 years ago

Definition of partial pressure and Dalton's law of partial pressure. Example of calculating partial pressure of a gas in a mixture from the total pressure and partial pressure of the other gases in the mixture. Chemistry on Khan Academy: Did you know that
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Teddy Bear Scare | Outrageous Acts of Science

517 views / 0 likes - added 7 years ago

#Outrageous_Acts Wednesdays at 9/8c on Science Sure, you may think this is a ridiculous reaction. But there's a scientific explanation to this man's intense fear! Watch full episodes: https://www.sciencechannelgo.com/outrageous-acts-of-science/ Subscribe
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"Impossible" Logic Puzzle - How Many Liars Are At The Party?

811 views / 0 likes - added 7 years ago

A party has 100 people who are either liars are truth tellers. Liars always lie and truth tellers always say the truth. After the party you ask each person, "How many truth tellers did you shake hands with?" Each person gives a different answer from 0 to
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How to Solve a Rubik's Cube | WIRED

1,837 views / 2 likes - added 4 years ago

WIRED's Robbie Gonzalez learned to solve a Rubik's cube from Tyson Mao, one of the co-founders of the World Cube Association. In two weeks, Robbie got his solve time down from 45 minutes with Tyson, to 20 minutes on his own, to under a minute on average.
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Don't Checkmate - Brain Teaser

789 views / 0 likes - added 8 years ago

Don't checkmate the black king. In this brain teaser you must find one move for white which will not result in immediate checkmate for the black king. I also have a bunch of other fun brain teasers as well. My name is Chris and my passion is to teach math
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Moving Faster Than The Speed Of Light? Special Relativity Velocity Addition Formula

685 views / 0 likes - added 7 years ago

If train A is moving towards train B, and each train moves at 75% the speed of light (relative to the ground), will an observer on train A think that train B is moving at 150% the speed of light? But nothing moves faster than the speed of light, so what i
04:53 Popular
Can You Solve The Friendship Riddle?

1,306 views / 0 likes - added 7 years ago

In a group of 6 people, you might find that some people are friends on Facebook, or you might find out that no one is friends on Facebook. Show that there is always a group of 3 people in which either: (a) all 3 people are mutual friends or (b) the 3 peop
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BONUS: History of the possessive apostrophe | The Apostrophe | Punctuation | Khan Academy

595 views / 0 likes - added 6 years ago

David, Paige, and Jake cover the fascinating history of the possessive apostrophe. Stay tuned for this bonus video! Missed the previous lesson? Watch here: https://www.khanacademy.org/humanities/grammar/punctuation/the-apostrophe/v/bonus-history-of-the-ap
02:37 Popular
Adults Stumped By Maths Questions For 15 Year Olds. Can You Solve Them?

797 views / 0 likes - added 7 years ago

How hard are math tests? A survey asked 2,000 UK adults to answer sample GCSE test questions intended for 15 year old students. On average, the survey questions were missed by about 40% of adults. Can you solve them? The video presents 2 questions that ma
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Can You Solve The Alien Extinction Riddle? Hard Job Interview Question

868 views / 0 likes - added 7 years ago

A single alien lands on Earth. Every day after that, each alien on Earth undergoes a transformation, which could be any of the four equally likely events: (a) the alien dies, (b) the alien does nothing, (c) the alien replicates itself (2 aliens total), (d
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The wacky history of cell theory - Lauren Royal-Woods

1,314 views / 0 likes - added 6 years ago

View full lesson: http://ed.ted.com/lessons/the-wacky-history-of-cell-theory Scientific discovery isn't as simple as one good experiment. The weird and wonderful history of cell theory illuminates the twists and turns that came together to build the found
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Inside Alzheimer’s disease

493 views / 0 likes - added 6 years ago

Our understanding of Alzheimer’s disease has come along way in the last century. In this animation, Nature Neuroscience takes us inside the brain to explore the cells, molecules and mechanisms involved in the onset and progression of this devastating cond
01:49 Popular
This Matchstick Puzzle Is

858 views / 1 likes - added 7 years ago

This classic matchstick/toothpick puzzle is making the rounds because it is supposedly "extremely hard" for adults. Can you make 3 squares by moving 3 matchsticks? You cannot break any of the sticks, the resulting squares must be of equal size, and each t
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05:09 Popular
Finding Units Of Rate Constant K

1,383 views / 0 likes - added 8 years ago

How to find the units for the rate constant k for a zero, first, or second order reaction. Chemistry on Khan Academy: Did you know that everything is made out of chemicals? Chemistry is the study of matter: its composition, properties, and reactivity. Thi
02:57 Popular
Can You Solve This Crazy Equation? Ramanujan's Radical Brain Teaser

1,097 views / 0 likes - added 7 years ago

In 1911, Srinivasa Ramanujan posed this problem involving an infinite nested radical (a never-ending expression that has square roots inside of square roots). Can you figure out how to simplify the equation? The video presents an intuitive solution. Techn
07:49 Popular
Can You Solve The Viral 9 = 72 Puzzle? The Correct Answer Explained

1,079 views / 0 likes - added 7 years ago

This problem has been shared millions of times on Twitter/Facebook with the claim "99% fail" to solve it and that only a genius could find the correct answer. If 9 = 72, 8 = 56, 7 = 42, 6 = 30, 5 = 20, then 3 = ? In this video I explain what many people b
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You will probably have to take a COVID-19 test. Here's how that test actually works.

276 views / 0 likes - added 4 years ago

Technologies such as PCR, serologic assays and rapid diagnostics help us understand the spread of COVID-19. But how do they do that?Please visit our website to discover the latest advances in science and technology: http://bit.ly/30Z4ZpZDiscover world-cha
06:01 Popular
Can You Solve The Viral 1 + 4 = 5 Puzzle? The Correct Answer Explained

11.8k views / 1 likes - added 7 years ago

This problem was shared on Facebook with the claim that only one in a thousand could figure it out. It went viral and generated over 3 million comments. Here is the problem. If 1 + 4 = 5, 2 + 5 = 12, 3 + 6 = 21, what is 8 + 11 = ? This video presents what
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The Power of Mathematical Visualization | The Great Courses

1,074 views / 0 likes - added 7 years ago

https://www.thegreatcoursesplus.com/show/the_power_of_mathematical_visualization?utm_source=US_SocialMedia&utm_medium=SocialMediaEditorialYoutube&utm_campaign=138569 The Power of Mathematical Visualization teaches you these vital problem-solving skills in
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BONUS VIDEO | Terminal Prepositions | Prepositions | The Parts Of Speech

543 views / 0 likes - added 8 years ago

It's totally okay to end sentences with prepositions! David, Khan Academy's grammarian-in-chief, explains the history and the context behind this long-held grammar myth. Missed the previous lesson? Watch here: https://www.khanacademy.org/humanities/gramma
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The Leidenfrost Effect: When Water Levitates

671 views / 0 likes - added 6 years ago

Subscribe! http://bit.ly/ACSReactions Have you ever seen a drop of water navigate a maze? It’s possible thanks to a weird phenomenon called the Leidenfrost Effect. Understanding Leidenfrost — first described more than 200 years ago — helped engineers make
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Prepositional Phrases | Prepositions | The Parts Of Speech | Grammar

739 views / 0 likes - added 8 years ago

Prepositional phrases are word chunks that begin with a preposition. Practice this yourself on Khan Academy right now: https://www.khanacademy.org/the-preposition/e/prepositional-phrases/ Missed the previous lesson? https://www.khanacademy.org/the-preposi
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Make The Best Pie Ever Using Science

446 views / 0 likes - added 6 years ago

You may have Grandma’s recipe for the perfect crust, but do you really know what goes on at a molecular level? Subscribe! http://bit.ly/1fUWHyY What Does A Cancer Cell Look Like?: https://youtu.be/BhAP6IfykEQ UCLA biophysicist Amy Rowat shares some of the
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TRAILER - Welcome to Deep Look | PBS Digital Studios | KQED

604 views / 0 likes - added 7 years ago

DEEP LOOK - see the unseen at the very edge of our visible world. Twice a month, get a new perspective on our place in the universe and meet extraordinary new friends. Explore big scientific mysteries by going incredibly small. DEEP LOOK is a ultra-HD (4K
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Does the Theory of Evolution Really Matter?

613 views / 0 likes - added 5 years ago

Support Stated Clearly on Patreon: https://www.patreon.com/statedclearly Students who may be disinterested or uncomfortable with the science of evolution often wonder why it is worth their time and effort to understand. Stated Clearly and Emory University
07:47 Popular
Can You Solve The Probability The Newborn Is A Boy? Many Fail This Interview Question

828 views / 0 likes - added 7 years ago

This problem has been asked in job interviews. On the morning of January 1, a hospital nursery has 3 boys and some number of girls. That night, a woman gives birth to a child, and the child is placed in the nursery. On January 2, a statistician conducts a
11:26 Popular
10 Tricky Riddles and Logic Puzzles To Sharpen Your Brain

1,119 views / 3 likes - added 5 years ago

If you are a Genius, can you solve this puzzle? So, test your ingenuity and knowledge with these top 10 amazing riddles and puzzles that 90% fail to answer. Subscribe to FactoFusion: http://bit.ly/FactoFusion Our Social Media: Like us on Facebook: https:/
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Sesame Street:“Elmo The Musical – Volume 2” Preview

822 views / 0 likes - added 9 years ago

It’s volume two of Elmo’s math-filled musicals, packed with 7 all-new to DVD episodes! With over two hours of music, adventure, math, friendship and fun, little learners will love to sing along! Includes a bonus full-length video of “Play With Me Sesame:
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Introduction To Agreement | Verbs | The Parts Of Speech

791 views / 0 likes - added 8 years ago

When you match up the subject of a sentence with a verb, it's called 'agreement'. Here's how it works! Practice this yourself on Khan Academy right now: https://www.khanacademy.org/humanities/grammar/partsofspeech/grammar-verbs/e/intro-to-verb-agreement M
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Introduction to reaction quotient Qc | Chemical equilibrium | Chemistry | Khan Academy

653 views / 0 likes - added 6 years ago

Introduction to the reaction quotient Qc, and how to use the reaction quotient to predict how the reaction concentrations will change. Chemistry on Khan Academy: Did you know that everything is made out of chemicals? Chemistry is the study of matter: its
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Newton and Leibniz: Crash Course History of Science #17

385 views / 1 likes - added 4 years ago

The standard story of the Scientific Revolution culminates with the long life of one man: Sir Isaac Newtona humble servant of the Royal Mint, two-time parliamentarian, and a scientific titan whose name, along with Einsteins, is synonymous with physics tod
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Can You Solve The Race To December 31 Riddle?

716 views / 0 likes - added 7 years ago

Here's a fun game you can play with another person. The game starts on January 1. Each of two players takes turns calling out another date. The new date has to be a later date in the year with either the same month OR the same day (from January 1, a playe
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Welcome to Deep Look | PBS Digital Studios | KQED

662 views / 0 likes - added 7 years ago

DEEP LOOK - see the unseen at the very edge of our visible world. Twice a month, get a new perspective on our place in the universe and meet extraordinary new friends. Explore big scientific mysteries by going incredibly small. DEEP LOOK is a ultra-HD (4K
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Conjugate acid-base pairs | Acids and bases | Chemistry | Khan Academy

586 views / 0 likes - added 6 years ago

Introduction to conjugate acid-base pairs. Definition and examples of conjugate acid-base pairs. Chemistry on Khan Academy: Did you know that everything is made out of chemicals? Chemistry is the study of matter: its composition, properties, and reactivit
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The Number Illusion You Won't Believe

278 views / 0 likes - added 3 years ago

Watch my newest video, "Could a Toothpaste Sandwich Brush Your Teeth?": https://youtu.be/OdeiWhETqQYSometimes math is so beautifully tricky, and presented in such a subtle way, that its virtually indistinguishable from magic. Welcome to The Kruskal Count.
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Map of Science (and everything else)

264 views / 0 likes - added 3 years ago

The Map of Science explores what science really is. Check out this video's sponsor https://brilliant.org/dosIn this video I investigate what makes a science a science, and how the scientific method is used in different subjects. I lay out all of the areas
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Prepositions Of Neither Space Nor Time | Prepositions | The Parts Of Speech | Grammar

921 views / 0 likes - added 8 years ago

Some prepositions describe relationships between people or things. These prepositions don’t include information about time or space. Watch the next lesson: https://www.khanacademy.org/the-preposition/e/common-prepositions Missed the previous lesson? Watch
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How to use italics and underlines | Punctuation | Khan Academy

571 views / 0 likes - added 6 years ago

Learn how to use italics and underlines when writing the titles of works or when emphasizing a particular word or phrase. Practice this yourself on Khan Academy right now: https://www.khanacademy.org/miscellaneous-punctuation/e/italics--underlines--and-qu
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How Close Are We To Computers That Think Like Humans?

839 views / 0 likes - added 8 years ago

Computers can do a lot, but when will they be able to think like humans? Help support DNews by completing this one-question survey http://bit.ly/dnewssurvey The Science of Surfboards ►►►► http://dne.ws/1MSpqJV Read More: New Brain-Like Computer May Solve
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07:36 Popular
Fractions - Adding and Subtracting

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Fractions - Adding and Subtracting. Examples involving both numerical and variable expressions and shown! For more free math videos, visit http://JustMathTutoring.com
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Ellipses | Punctuation | Khan Academy

674 views / 0 likes - added 6 years ago

Ellipses are three little dots that we use to show a pause or that a portion of a quote has been removed. Learn how to use them in this video. Practice this yourself on Khan Academy right now: https://www.khanacademy.org/miscellaneous-punctuation/e/introd
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How to Multiply With Parentheses

432 views / 0 likes - added 5 years ago

How to Multiply With Parentheses. Part of the series: Math Help With Multiplying. Multiplying with parenthesis requires you to do things in a very specific order. Find out about multiplying with parenthesis with help from a mathematics educator in this fr
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Infinite Series - Numberphile

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Fields Medallist Charlie Fefferman talks about some classic infinite series. More links & stuff in full description below ↓↓↓ Charles Fefferman at Princeton: https://www.math.princeton.edu/people/charles-fefferman Numberphile is supported by the Mathemati
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Can YOU Solve It? This Question Stumped 75% Of PhD Economists

609 views / 0 likes - added 7 years ago

Introductory economics courses cover the concept of an opportunity cost. Can you figure out the opportunity cost for the problem in the video? This video presents a question that surprisingly more than 75% of PhD economists did not answer correctly. Paper
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The Bouba-Kiki Effect

760 views / 0 likes - added 8 years ago

http://www.sciencefriday.com If you were looking at two shapes—specifically, a pointy, jagged polygon and an amoeboid-like splotch—which would you name "bouba," and which would you name "kiki"? In most scientific research, upwards of 90 percent of people
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Guess The Diagonal - Brain Teaser

1,095 views / 0 likes - added 8 years ago

Try to solve this brain teaser in less than a minute. You must guess the diagonal inside of the circle. There is enough information given which allows you to find the length of the diagonal in less than a minute. My name is Chris and my passion is to teac
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Introduction to the apostrophe | The Apostrophe | Punctuation | Khan Academy

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David and Paige, KA’s resident grammarians, introduce a new piece of punctuation: the apostrophe! Practice this yourself on Khan Academy right now: https://www.khanacademy.org/the-comma/e/introduction-to-the-apostrophe Watch the next lesson: https://www.k
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Why Do We Sleep? - Instant Egghead #55

693 views / 0 likes - added 8 years ago

We spend nearly a third of our lives asleep, but scientists don't agree on sleep's purpose. Scientific American contributor Joss Fong explains what we know, and don't know, about our nightly slumber. -- WATCH more Instant Egghead: http://goo.gl/CkXwKj SUB
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Can You Solve The Rectangle Ratio Puzzle? The Surprising Answer

855 views / 0 likes - added 7 years ago

Start with a unit square (a rectangle with both sides equal to 1, call it R1). Attach a rectangle of area 1 to its right side, then attach a rectangle of area 1 to its top. The border of this new shape is another rectangle, call it R2. We can repeat the p
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Can You Solve This Harvard Admissions Question? Algebra Problem, 1869

1,475 views / 0 likes - added 7 years ago

The Harvard admissions exam in 1869 included this algebra problem: "A man bought a watch, a chain, and a locket for $216. The watch and locket together cost three times as much as the chain, and the chain and locket together cost half as much as the watch
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4 Common Misconceptions About A.I.

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4 big misconceptions about artificial intelligence (A.I.), machines and superintelligence. A lot of this video was based on a chapter of the book "Life 3.0" by Max Tegmark. 1:19 - 1. The Risk of a Robot Take-Over 3:57 - 2. We Should Be Worried About Machi
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How Atom Bombs Can Uncover Forged Art

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Want more cool art videos? Check out The Art Assignment http://bit.ly/ArtAssnmt Don’t miss our next video! SUBSCRIBE! ►► http://bit.ly/iotbs_sub ↓↓↓ More info and sources below ↓↓↓ It’s been estimated that 1 in 10 works of fine art are forged or misattrib
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05:57 Popular
Can You Solve This 6th Grade Geometry Problem From Singapore? The Area Of A "Claw"

1,129 views / 1 likes - added 7 years ago

This problem was given to Primary 6 (age 11-12) students in Singapore. What is the area of the shaded region in the video, which consists of the region bounded by 4 quarter circles in a 3x3 grid of squares, and each square has a side length of 4? The shad
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How big is infinity? - Dennis Wildfogel

481 views / 0 likes - added 6 years ago

View full lesson: http://ed.ted.com/lessons/how-big-is-infinity Using the fundamentals of set theory, explore the mind-bending concept of the "infinity of infinities" -- and how it led mathematicians to conclude that math itself contains unanswerable ques
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Can You Solve This MIT Admissions Question? Geometry Problem, 1869

951 views / 0 likes - added 7 years ago

The Massachusetts Institute of Technology (MIT) is one of the top ranked universities in the world. This question appeared on its admissions exam nearly 150 years ago. "The perpendicular dropped from the vertex of the right angle upon the hypotenuse divid
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Can You Solve The Missing Sock Puzzle?

618 views / 0 likes - added 7 years ago

A statistician keeps a simple wardrobe. He only purchases pairs of black socks and white socks, and he keeps all of the socks in a pile in the drawer. Recently one of the socks was lost in the laundry. The socks have a mathematical property. If you select
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Beginning sentences with conjunctions | The parts of speech | Grammar | Khan Academy

786 views / 0 likes - added 6 years ago

Is it okay to begin a sentence with a conjunction like "but" or "because"? Yes. David explains why. Missed the previous lesson? https://www.khanacademy.org/humanities/grammar/partsofspeech/conjunctions/v/correlative-conjunctions?utm_source=YT&utm_medium=D
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Why Does Bacon Smell So Good? | COLOSSAL QUESTIONS

1,412 views / 6 likes - added 3 years ago

We all love the sound and smell of crackling bacon fresh out of the pan! So, whats the deal? Is there a scientific answer to why bacon smells particularly good??Images used under license from Shutterstock.comWelcome to Colossal Questions, the show that an
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How to Solve for the Height of Cylinders

785 views / 0 likes - added 5 years ago

How to Solve for the Height of Cylinders. Part of the series: Algebra Tips. Solving for the height of cylinders can be accomplished in just a few moments with the right equation. Learn how to solve for the height of cylinders with help from an experienced
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The Horse Horseshoe Boots Viral Algebra Problem - The Correct Answer Explained

1,728 views / 2 likes - added 7 years ago

A lot of people are arguing over the correct answer to this algebra problem involving horses, horseshoes, and boots. A Facebook post with this problem has over 500,000 comments. Can you figure it out? In this video I explain the correct answer. Blog post:
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Can You Solve The Viral 11x11 = 4 Puzzle? The Correct Answer Explained

3,054 views / 1 likes - added 7 years ago

If 11x11=4 and 22x22=16, what is 33x33=? This puzzle has been shared with the claim that only geniuses can solve it. It has gotten millions of views on the internet and Facebook as people have debated the correct answer. In this video I present what many
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This microscopic world shows that beauty is all around us, even if it's invisible to the naked eye

306 views / 0 likes - added 3 years ago

The Nikon Small World in Motion competition brings together talented microscopists from all over the world. What they have been able to capture will likely astound you, even though sometimes what you're seeing is pond scum. Please visit our website to dis
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This is some of the best, most beautiful video microscopy in the world

285 views / 0 likes - added 3 years ago

The Nikon Small World in Motion competition brings together talented microscopists from all over the world. What they have been able to capture will likely astound you, even though sometimes what you're seeing is pond scum. Please visit our website to dis
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Can You Solve The Red Ball Lottery Puzzle?

673 views / 0 likes - added 7 years ago

(Same video without the music: https://youtu.be/sz5oLEpc8xE) This problem involves 100 red balls, 100 blue balls, and 2 urns. First you distribute all the balls between the 2 urns, placing at least 1 ball in each urn. Next, you select an urn at random, an
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What is relativity all about?

317 views / 0 likes - added 5 years ago

Einstein’s theory of special relativity is one of the fascinating scientific advances of the 20th century. Fermilab’s Dr. Don Lincoln has decided to make a series of videos describing this amazing idea. In this video, he lays out what relativity is all ab
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Can You Solve The Magical Pond Puzzle?

1,035 views / 1 likes - added 7 years ago

(Same video with music: https://youtu.be/nF-Gpk0ZpRk) You visit a shrine that has 3 temples. Before each temple, you have to swim in a magical pond. Your path is pond-temple1-pond-temple2-pond-temple 3. Each time you swim, the pond magically triples the n
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Introduction To The SAT Writing & Language Test | Tips & Planning | New SAT | Khan Academy

767 views / 0 likes - added 8 years ago

This is the last video in our New SAT subject! Missed the previous lesson? https://www.khanacademy.org/test-prep/new-sat/new-sat-tips-planning/new-sat-about-sat/v/sat-reading-test-intro?utm_source=YT&utm_medium=Desc&utm_campaign=NewSAT New SAT (starting M
04:51 Popular
Hyphens vs. dashes | Punctuation | Khan Academy

841 views / 1 likes - added 6 years ago

Hyphens and dashes look pretty similar, but their uses are very different! Learn when to use each one in this video. Practice this yourself on Khan Academy right now: https://www.khanacademy.org/miscellaneous-punctuation/e/dashes-and-hyphens Watch the nex
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Can You Solve The Marriage Logic Problem? 80% Fail

679 views / 0 likes - added 7 years ago

Surveys have found 80 percent get this logic problem wrong. Alice is looking at Bob, and Bob is looking at Charlie. Alice is married; Charlie is not. Is a married person looking at an unmarried person? Answer choices are A) Yes, B) No, and C) Cannot be de
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Dividing a Number by a Larger Number : Fractions/ Decimals / Percents

1,091 views / 1 likes - added 8 years ago

Dividing a Number by a Larger Number : Fractions/ Decimals / Percents. In this video, I show how to divide: 9 / (48) by making this number into a decimal and then into a percentage. For more free math videos, visithttp://justmathtutoring.com/
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Can You Solve This Grade 12 Geometry Problem From Australia? The Marshmallow Chocolate Puzzle

911 views / 0 likes - added 7 years ago

A marshmallow has the shape of a cylinder with diameter 5 and height 3. A dessert is made with 24 marshmallows: there are two stacked layers of marshmallows, and each layer has 3 rows of 4 marshmallows. The gaps between the marshmallows are filled with ch
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Why you lose your hair when you get older

457 views / 0 likes - added 6 years ago

A wide variety of factors can cause baldness in men and women. Scientific studies show that chromosomes from both father and mother can lead to hair loss. Read more: http://www.businessinsider.com/sai FACEBOOK: https://www.facebook.com/techinsider TWITTER
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Compound Prepositions | Prepositions | The Parts Of Speech | Grammar

963 views / 0 likes - added 8 years ago

These prepositions are called compound prepositions, or multisyllabic prepositions. Like most prepositions, they have both literal and figurative meanings. David explains. Watch the next lesson: https://www.khanacademy.org/humanities/grammar/partsofspeech
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Long Division of Numbers - Arithmetic Basics, Ex 2

2,471 views / 1 likes - added 8 years ago

Example 3: https://www.youtube.com/watch?v=pP4VWFGMHNg Long Division of Numbers - Arithmetic Basics, Ex 2. In this video, I show how to make a fraction into a decimal doing long division. For more free math videos, visit http://PatrickJMT.com
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02:41 Popular
Trick Question - True or False

871 views / 0 likes - added 7 years ago

Think you can answer this simple trick question? Does .9 repeating equal 1? Find the solution in this video. My name is Chris and my passion is to teach math. Learning should never be a struggle which is why I make all my videos as simple and fun as possi
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05:33 Popular
What is 6÷2(1+2) = ? The Correct Answer Explained

885 views / 0 likes - added 7 years ago

What is 6÷2(1+2) = ? This problem went viral and generated millions of comments on Facebook, Twitter, YouTube and social media sites. I explain how to get the correct answer by using the modern interpretation of the order of operations. I also explain how
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