Search Results: "perpendicular lines"

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12:33 Popular
What Life On Other Planets Would Look and Sound Like

1,337 views / 2 likes - added 5 years ago

Our planet is just one part of an infinite universe. Join us as we explore what living on other planets would look, and sound like. Subscribe for more! ► https://goo.gl/pgcoq1 ◄ Stay updated ► https://goo.gl/JyGcTt https://goo.gl/5c8dzr ◄ For copyright qu
57:39
The Science of Light and Lasers | Szydlo's At Home Science

313 views / 0 likes - added 3 years ago

The laser is a key part of so much of our modern world, from fibre-optic cabling to eye surgery. The origin story of lasers goes all the way back to the pioneering work of Isaac Newton. Join Andrew as he spins a tale of the the study of light and lasers,
01:18 Popular
Can You Make 4 Triangles From 6 Matches?

985 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
04:22 Popular
Impossible Algebra Problem

1,244 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
03:25 Popular
Can You Solve This? AA + BB + CC = ABC

2,484 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
10:24 Popular
The Real Meaning Of E=mc² | Space Time | PBS Digital Studios

1,668 views / 0 likes - added 8 years ago

Want to ask some sort of crazy question about Space?: Tweet at us! @pbsspacetime Facebook: facebook.com/pbsspacetime Email us! pbsspacetime [at] gmail [dot] com Comment on Reddit: http://www.reddit.com/r/pbsspacetime Let us know what topics you want to le
04:50
What happens to your brain during a migraine - Marianne Schwarz

220 views / 2 likes - added 3 years ago

Find out whats happening in the brain when you have a migraine and what we still dont know about this complex disorder.--A throbbing, pounding headache. Bright zigzagging lines across your field of vision. Sensitivity to light, lingering fatigue, disrupte
Warmest Tent on Earth - Pitching in the Siberian Arctic Winter -

210 views / 0 likes - added 2 years ago

The Nenet reindeer herders need to move their tent every few days throughout most of the year. Every time they migrate they must pack the whole tent away, drag it across the tundra on sledges, and erect it again in a fresh place, sometimes in temperatures
06:58
Why Don't Ants Get Stuck In Traffic?

591 views / 1 likes - added 7 years ago

Go to http://Raceforretirement.com and see how the action gap affects you. Tweet this video ⇒ http://bit.ly/OKTBStraf Share on FB ⇒ http://bit.ly/OKTBStrafFB ↓ More info and sources below ↓ CGP Grey “The Simple Solution to Traffic” https://youtu.be/iHzzSa
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02:24
Coronavirus Is Changing Everything

543 views / 1 likes - added 4 years ago

By Aspen | Subscribe: http://bit.ly/sub2storybooth | Since finding out about the coronavirus pandemic, Aspen has been very concerned about the virus and the effect that it's having on our world. Like so many teens, she wants to share her thoughts and feel
04:42
How Warren Buffett Tried To Trick Bill Gates In A Dice Game

688 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
02:58
We Didn’t Think This Part of the Brain Existed, and It Could Save Your Life

647 views / 0 likes - added 5 years ago

Scientists recently discovered a never-before-seen drainage system in the brain! Here's how it could lead to exciting breakthroughs in the treatment of neurological diseases. Doctors Have to Trick Your Brain’s Defenses to Heal You, Here’s Why - https://yo
01:57 Popular
I Will Read Your Mind - Math Magic Trick

1,257 views / 2 likes - added 7 years ago

Pick a 2 digit number. Got it? Now and add up the digits. Subtract that from your original number. Look up the resulting number in the table. Can I figure out the symbol you are looking at? This video predicts your symbol and explains why this math trick
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05:57
How To Split A Cake Fairly Using Math

697 views / 0 likes - added 7 years ago

How can 2 people split up a cake, knowing that each person wants to get a larger piece than the other? What about 3 people, or even N people? This is an example of a fair division problem from game theory. There are many cake-cutting algorithms to produce
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12:32 Popular
Top 10 Most Bizarre Deep Sea Creatures Ever Discovered

2,382 views / 7 likes - added 6 years ago

Deep Sea Creatures are as bizarre as creatures get. From angler fish to giant squid, here are some of the weirdest bizarre deep sea creatures caught on tape. Subscribe for more! ► https://goo.gl/pgcoq1 ◄ Stay updated ► https://goo.gl/JyGcTt https://goo.gl
08:38
Bach, Toccata and Fugue in D minor, organ

321 views / 0 likes - added 3 years ago

Bach's most famous organ piece, with a bar-graph score.FAQQ: I appreciate the work you're doing; how can I support it?A: Thank you! The easiest way to support my work is by contributing via Patreon: http://www.patreon.com/musanimIf you'd like to help in m
06:24 Popular
The Seemingly Impossible Escape Logic Puzzle

1,454 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
04:52 Popular
Can You Solve The Two Rope Puzzle?

714 views / 0 likes - added 7 years ago

You have two ropes and a lighter. Each rope burns in 60 minutes, but the ropes do not burn at a constant rate. How can you measure 45 minutes by burning the ropes? Some of you might have heard this problem before. If so, try this variation: how can you me
05:02
Bach, Canone alla decima, Art of Fugue

577 views / 0 likes - added 6 years ago

Canon at the tenth (with counterpoint at the third) from J. S. Bach's Art of Fugue, performed by Kimiko Ishizaka, with an animated graphical score. FAQ Q: Why do the notes sometimes not line up? A: In this canon, Bach takes liberties with the transpositio
03:26
Why Are Your Fingerprints Unique?

366 views / 0 likes - added 5 years ago

Try Dashlane Premium free for 30 days: https://www.dashlane.com/MinuteEarth. Use the coupon code ‘MinuteEarth’ to get 10% off Dashlane Premium. Because of the chaotic way fingerprints develop and the multiplying effect of compound probability, it's basica
15:31 Popular
24 AMAZING OPTICAL ILLUSIONS That Will Trick Your Eyes!

779 views / 0 likes - added 2 years ago

Hi Everyone :) Welcome back! Buy physicsfun toys on : https://bit.ly/2MOjFET This video contains many interesting / satisfying /innovative science Illusion / physics Illusion. If you guys liked this video please follow us on Instagram : https://www.instag
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
04:09
We May Finally Know Why Earths Magnetic North Keeps Moving

323 views / 0 likes - added 3 years ago

Magnetic north keeps shifting, but we may finally know whats causing it. Subscribe to Seeker! http://bit.ly/subscribeseeker Watch more Elements! http://bit.ly/ElementsPlaylist Visit our shop at http://shop.seeker.comThe Earth's magnetic north pole is shif
07:52 Popular
Find The 10 Digit Number Classic Puzzle And Solution

891 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:
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
04:13 Popular
Adults Stumped By Geometry Problems For 10 Year Olds. Can You Solve Them?

846 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
07:10
TOUGH Interview Question - Ways To Give 11 Coins To 3 People

614 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
07:36
SpongeBob Arrested After No-Pants Fight! | NEW Original Series | Bikini Bottom Inquirer Ep. 1

241 views / 1 likes - added 1 year ago

Welcome to Bikini Bottom Inquirer where investigative thrills are packed to the gills! Im your host Perch Perkins with the latest local news! Heres todays rundown:0:00 Intro + Top Stories0:53 Community Poll: Most Handsome Man in Bikini Bottom1:19 NEWSFLAS
10:22 Popular
Can A Circle Be A Straight Line? | Space Time | PBS Digital Studios

1,427 views / 0 likes - added 8 years ago

Want to ask some sort of crazy question about Space?: Tweet at us! @pbsspacetime Facebook: facebook.com/pbsspacetime Email us! pbsspacetime [at] gmail [dot] com Comment on Reddit: http://www.reddit.com/r/pbsspacetime Let us know what topics you want to le
11:55
25 DELICIOUS FOOD DECOR IDEAS

616 views / 0 likes - added 5 years ago

MIND-BLOWING FOOD DECOR IDEAS This video is for those who love cooking! Even though, if you never cooked anything special before, the ideas from this tutorial video for kids, may inspire you to become a pro in cooking and food decor. Use our incredible id
02:57 Popular
Viral Facebook Math Problem

1,293 views / 1 likes - added 7 years ago

This problem has over 2 million comments on Facebook and is getting coverage in mainstream media and blogs. Can you figure out this Facebook fruit algebra puzzle involving apples, bananas, and coconuts? The video presents what many people consider to be t
08:27
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
03:31 Popular
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
05:38 Popular
Decimals As Words | Decimals | 4th Grade | Khan Academy

1,416 views / 0 likes - added 8 years ago

Learn how to describe decimals in words. 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/decimals-in-words?utm_source=YT&utm_medium=Desc&utm_campaign
04:40
The science of the self explained by a biologist | Michael Levin

118 views / 0 likes - added 8 months ago

How do you emerge from a collection of cells? A biologist explains. This interview is an episode from @The-Well our publication about ideas that inspire a life well-lived, created with the @JohnTempletonFoundation .Subscribe to The Well on YouTube https:/
07:22
The fight for America's 51st state, explained

412 views / 0 likes - added 3 years ago

Washington, DC is closer than ever to becoming a state. Could it actually happen?Subscribe to our channel! http://goo.gl/0bsAjOOn June 26, 2020, the US House of Representatives voted to make Americas capital city, Washington, DC, the countrys 51st state.
02:45 Popular
The Day After Tomorrow Is Yesterday Riddle. Can You Solve It?

708 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
03:29 Popular
Comparing Decimals Example 1 | Decimals | 4th Grade | Khan Academy

1,498 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
02:23
This SAT Math Question Has A Mistake

669 views / 0 likes - added 7 years ago

This question appeared on the October 1980 SAT exam. Like all questions, it was supposed to have exactly one correct answer. However the test-makers made a mistake. Can you figure out what they did wrong? Blog post (text explanation): http://wp.me/p6aMk-4
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

1,046 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
03:33 Popular
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
05:09 Popular
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
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&
01:48 Popular
"Picture Perfect Girl" Official Lyric Music Video | Barbie Princess Adventure | @Barbie

1,089 views / 5 likes - added 3 years ago

Sing along with Barbie to Picture Perfect Girl from the all-new musical movie Barbie Princess Adventure, available NOW on Netflix! #Barbie #BarbiePrincessAdventure #Netflix LYRICS:You might think I have everythingA girl could ever wantA palace full of lux
04:08 Popular
Plotting Decimal Numbers On A Number Line (examples) | Khan Academy

914 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_
06:57
When Is Christmas? Mentally Convert Date To Day Of The Week

532 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
03:06 Popular
Decimal Intuition With Grids (examples) | Decimals | 4th Grade | Khan Academy

1,261 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-
06:55 Popular
Place Value For Decimals Greater Than One (examples) | 4th Grade | Khan Academy

1,174 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
04:37 Popular
Fraction-decimal Intuition Problems (examples) | 4th Grade | Khan Academy

1,036 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
07:40 Popular
Comparing Numbers Represented In Different Ways | 4th Grade | Khan Academy

747 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
08:39 Popular
What Is The Shortest Poem?

1,092 views / 0 likes - added 9 years ago

Click to SUBsauce: http://bit.ly/POIaN7 http://www.twitter.com/tweetsauce **sources and bonus links below** music by http://www.youtube.com/JakeChudnow ABCDEFGHIJKLMNOPQRSTUVWXYZ Big Bird song: http://www.youtube.com/watch?v=pr5er4ueWBQ John Denver's "Bal
05:56 Popular
10 Amazing Paper Tricks!

906 views / 1 likes - added 8 years ago

Add me on Facebook (click LIKE on Facebook to add me) http://www.facebook.com/brusspup Download links for the music in the video: Song #1 - Soul Switch - iTunes: https://itunes.apple.com/us/album/soul-switch-single/id426471027 Amazon: http://www.amazon.co
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02:35 Popular
Comparing Fractions Visually With A Bar | Fractions | 4th Grade | Khan Academy

1,111 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
05:39 Popular
Can You Solve A 5th Grade Problem From China? Find The Area Of ABCD

794 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
05:50
Future Batteries Could Be Made out of Viruses...Wait, What?

294 views / 0 likes - added 3 years ago

Were now using viruses to make batteries...like the kind you could use in your car. So, how does that work and how close are we to a virus-powered car? Subscribe to Seeker! http://bit.ly/subscribeseeker Watch more Elements! http://bit.ly/ElementsPlaylist
02:44
Scientists Create First-Ever 3-D Model of a Melting Snowflake

614 views / 0 likes - added 6 years ago

This visualization is based on the first three-dimensional numerical model of melting snowflakes in the atmosphere, developed by scientist Jussi Leinonen of NASA's Jet Propulsion Laboratory in Pasadena, California. A better understanding of how snow melts
10:58
The Surprising Thing You Never Knew About Cheetos

294 views / 0 likes - added 3 years ago

Cheetos have been called "one of the most marvelously constructed foods on the planet" and even if that is hyperbole, there's no denying that this snack food is incredibly popular. There's quite a bit of science and some interesting history behind this ch
04:11 Popular
Decomposing Hundredths Into Tenths And Hundredths | 4th Grade | Khan Academy

1,484 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
05:55 Popular
"Impossible" Logic Puzzle - How Many Liars Are At The Party?

814 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
03:28 Popular
Flower Math Problem - Adults Stumped By Question For Kids In China

1,396 views / 2 likes - added 7 years ago

This problem is said to come from a test given to a Chinese kindergarten class (5 year olds). It was posted online and caused a lot of debate as adults were stumped about the correct answer, some saying it is impossible. Can you figure it out? This video
15:15
Moving Faster Than The Speed Of Light? Special Relativity Velocity Addition Formula

687 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?

1,309 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
05:25
Why Your Dog Can Remember Smells and You Can't

221 views / 0 likes - added 3 years ago

Dogs have some seriously impressive sniffers. But why are dog noses so powerful and how is it that they can remember precise smells over long periods of time? Subscribe to Seeker! http://bit.ly/subscribeseeker Visit our shop at http://shop.seeker.comIt al
01:47 Popular
Decompose Hundredths On Number Line | Fractions | 4th Grade | Khan Academy

1,580 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
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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06:06 Popular
Equivalent Fractions And Different Wholes | Fractions | 4th Grade | Khan Academy

812 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-
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
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
04:20 Popular
Visually Converting From Tenths To Hundredths | 4th Grade | Khan Academy

1,195 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
03:25 Popular
Is Eating Boogers Actually Unhealthy?

701 views / 1 likes - added 5 years ago

Over 90% of adults pick their nose. And afterward, many people eat those boogers. But it turns out, that can be unhealthy and dangerous. Boogers trap invading viruses and bacteria before than can enter your body. So eating those boogers might expose your
07:25 Popular
Can You Solve The Race To December 31 Riddle?

717 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
03:21 Popular
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
05:48
What Is The Area? "You Should Be Able To Solve This"

509 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
10:22
1940s BELL TELEPHONE "MOBILE TELEPHONES" MOVIE EARLY CELL PHONE / MOBILE TELEPHONE SYSTEM 90884

323 views / 3 likes - added 3 years ago

Created in the late 1940s, this film from Bell explains the operation of the Mobile Telephone Service (MTS) by showing how it can be used to make business more efficient. The film also shows some of the cutting edge equipment used in the system and shows
13:40 Popular
BEST Way To Play Memory (Card Game) - WIN Using Math

955 views / 0 likes - added 7 years ago

The card game of memory (aka concentration) is a children's game to test visual recall. Strategically you can figure out the best move by doing probability calculations. This video explains the best possible way to play the game mathematically. You can le
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03:17
Can YOU Solve It? This Question Stumped 75% Of PhD Economists

610 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
09:11 Popular
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
03:48 Popular
Can You Solve This Harvard Admissions Question? Algebra Problem, 1869

1,476 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
08:05 Popular
Can You Solve The Hardest Easy Geometry Problem?

1,274 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
05:57 Popular
Can You Solve This 6th Grade Geometry Problem From Singapore? The Area Of A "Claw"

1,131 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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Can You Solve The Missing Sock Puzzle?

619 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
02:51 Popular
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:
03:16 Popular
Can You Solve This 8th Grade Geometry Problem? 75% Got The Wrong Answer

1,004 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.
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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
07:21 Popular
Can You Solve The Magical Pond Puzzle?

1,036 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
02:37 Popular
Adults Stumped By Maths Questions For 15 Year Olds. Can You Solve Them?

800 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
03:09
Can You Solve The Marriage Logic Problem? 80% Fail

680 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
04:13 Popular
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
05:33 Popular
What is 6÷2(1+2) = ? The Correct Answer Explained

886 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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02:57 Popular
Can You Solve This Crazy Equation? Ramanujan's Radical Brain Teaser

1,099 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
03:54 Popular
What's The Best Soup Can Size? The Optimal Cylinder Puzzle

801 views / 0 likes - added 7 years ago

A cylindrical can with volume V can be made in different ways. The cylinder can be wide and short (large radius and small height), or it can be narrower and taller (small radius and larger height). Which shape uses the least material? That is, which can h
02:14 Popular
How To Reveal Subatomic Particles At Home | NOVA

820 views / 0 likes - added 8 years ago

Here's a way you can reveal subatomic particles that are shooting in front of your eyes all the time. NOVA Facebook: https://www.facebook.com/NOVAonline NOVA Twitter: https://www.twitter.com/novapbs Credits: Produced, animated, and edited by Greg Kestin A
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07:40 Popular
Can You Solve The 21 Flags Game From Survivor?

892 views / 1 likes - added 7 years ago

Contestants on the TV show "Survivor" faced off in a series of challenges for a grand prize of $1 million. Most of the challenges were physical like hiking many miles or diving underwater. But one challenge was mathematical. The game had 21 flags and cont
08:51 Popular
The Viral Balloon Puzzle - The REAL Answer Explained (Using Ph.D. Level Math)

772 views / 0 likes - added 5 years ago

They say only geniuses can solve this puzzle, and this time they are correct. Thanks to all patrons! Special thanks to: Shrihari Puranik Yildiz Kabaran Kyle My blog post for this video https://wp.me/p6aMk-82U Sources https://puzzling.stackexchange.com/que
09:50 Popular
Can You Solve This 6th Grade Geometry Problem From China?

1,263 views / 1 likes - added 7 years ago

What is the total area of the red spots? The diagram involves a rectangle with dimensions of 10 and 20. Inside the rectangle one of its diagonals is connected. There are two circles of equal size that are tangent to each other and the rectangle. The video
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05:52 Popular
Can You Solve The "MEANEST" SAT Test Question Ever?

705 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
02:06 Popular
Can You Solve The Viral Matchstick Puzzle 6 + 4 = 4?

3,485 views / 0 likes - added 7 years ago

Can you fix 6 + 4 = 4 by moving 1 matchstick? This problem has gone viral on Facebook, with one post having over 400,000 shares. The ground rules are you cannot break a stick, it should be an equality (=), and you have to use 7-segment numbers (the block
06:03 Popular
10 Amazing Optical Illusions

1,672 views / 10 likes - added 8 years ago

10 Amazing Optical Illusions that will melt your mind - Compilation This video is compilation of 10 amazing optical illusions: Rooftop Illusion, Color Illusion, Motion Binding Illusion, Crazy Wire Illusion, Duck-Rabbit Illusion, Silver Egg Illusion, Anamo
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06:18 Popular
Can You Solve The Diluted Wine Puzzle?

766 views / 1 likes - added 7 years ago

A servant has a method to steal wine. He removes 3 cups from a barrel of wine and replaces it with 3 cups of water. The next day he wants more wine, so he does the same thing: he removes 3 cups from the same barrel (now with diluted wine) and replaces it
04:30 Popular
Adults Are Arguing About This 3rd Grade Math Problem

894 views / 0 likes - added 7 years ago

"If Sue runs around the track twice, and John runs around the track four times more than Sue, how many times does John run around the track?" This problem was given to 3rd graders. A parent disagreed with the answer the teacher was marking. After it was p
09:18
The Mystery Of Paperclips

194 views / 0 likes - added 2 years ago

As an innovation, the modern paperclip has a peculiar history.HISTORY OF PAPERPaper was first created in China during the first century A. Initially made from cotton and linen, these fabric papers were expensive to produce and were generally reserved for
11:57
The Wallis Formula For π

586 views / 0 likes - added 7 years ago

Start with the pair of fractions (2/1)(2/3). Now increment each number by 2 to get the pair of fractions (4/3)(4/5). Repeat this to get the next pair, and repeat this infinitely many times. If you then multiply all the fractions, you get a marvelous value
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
07:03
The COVID-19 Vaccines Are Here. So What Happens Next?

283 views / 1 likes - added 3 years ago

Getting approval for one or more COVID-19 vaccines is just the first step on the long journey we've been on now. Subscribe to Seeker! http://bit.ly/subscribeseeker Watch more Elements! http://bit.ly/ElementsPlaylist Visit our shop at http://shop.seeker.co
10:48 Popular
How The Immune System ACTUALLY Works IMMUNE

2,085 views / 3 likes - added 2 years ago

To preorder IMMUNE click here: https://kgs.link/ImmuneBook Its available in English and German and on amazon it should be available in pretty much all countries too.Sources & further reading:https://sites.google.com/view/sources-immunesystemexplained/The
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55:29
How code has changed the world - with Torie Bosch

102 views / 0 likes - added 1 year ago

Why does computer code have such a huge impact on our lives? From the Y2K bug to the history of pop-up ads, discover how code has changed the world.Buy the book here: https://geni.us/X2ENWatch the Q&A here: https://youtu.be/jTvcnGzPj8YEverything from law
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Can You Solve The Alien Extinction Riddle? Hard Job Interview Question

870 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
14:51
25 BEST SUMMER FRUIT HACKS

541 views / 0 likes - added 5 years ago

SUMMER FRUIT HACKS Summer season is the ultimate time to fill up your organism with vitamines and other useful substances. But first let's find out how to cut the fruits quickly and correctly. If you forgot a knife for your picnic and don't know how to cu
03:57
What Does It Take To Enrich Uranium?

467 views / 0 likes - added 4 years ago

We're constantly hearing about nuclear enrichment in the news, but what does it mean and when should we be concerned? Subscribe to Seeker! http://bit.ly/subscribeseeker Watch more Elements! http://bit.ly/ElementsPlaylist Visit our shop at http://shop.seek
06:03
How Space-Time Works When You Look At The Stars

306 views / 0 likes - added 3 years ago

We're used to looking at everything around us unfolding in real time. But when we look at the stars, were actually looking at the past. We arent seeing the stars, or really anything in the universe, as they currently are. Were seeing things as they were.
02:01
Top Secret! Backwards Bookstore (1984)

349 views / 0 likes - added 4 years ago

The entire scene from this movie was filmed backwards!Top Secret! movie clips: http://j.mp/1BcPCH2 BUY THE MOVIE: http://amzn.to/u43N4H Don't miss the HOTTEST NEW TRAILERS: http://bit.ly/1u2y6pr CLIP DESCRIPTION: A Swedish bookstore owner (Peter Cushing)
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The Big Misconception About Electricity

194 views / 0 likes - added 2 years ago

The misconception is that electrons carry potential energy around a complete conducting loop, transferring their energy to the load. This video was sponsored by Caséta by Lutron. Learn more at https://Lutron.com/veritasium Further analysis of the l
06:28
The Science of Dogs

404 views / 0 likes - added 3 years ago

In this video, we'll discuss 12 unbelievable scientific facts about dogsDogs are complex and amazing creatures. You probably know quite a bit about these fascinating animals, but theres always more to learn and, as we continue to love our devoted doggies,
16:26
Burning Lasers Shoot Wherever I Look! (what could go wrong?)

457 views / 0 likes - added 2 years ago

Huge thanks to OnePlus for sponsoring this video! Visit this link: https://gleam.io/HP48b/oneplus-x-hacksmith-industries-giveaway and enter the giveaway for your chance to win one of 50 OnePlus Buds Z2 or one of 25 OnePlus Phones.#superman #lasereyes #hea
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Computers just got a lot better at writing

319 views / 0 likes - added 3 years ago

How machines can mimic our language.Join the Open Sourced Reporting Network: http://www.vox.com/opensourcednetworkSomething big happened in the past year: Researchers created computer programs that can write long passages of coherent, original text.Langua
13:18
97% Of People Can't Tell What Color This Is

697 views / 4 likes - added 4 years ago

Optical Illusions Reacted to by Teens. Original links below. Join the SuperFam and support FBE: https://www.youtube.com/user/React/join SUBSCRIBE & HIT THE . New Videos 2pm PT on FBE: http://fbereact.com/SubscribeFBE What should we react to next?? htt
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Can A Thousand Tiny Swarming Robots Outsmart Nature? | Deep Look

607 views / 1 likes - added 7 years ago

How does a group of animals -- or cells, for that matter -- work together when no one’s in charge? Tiny swarming robots--called Kilobots--work together to tackle tasks in the lab, but what can they teach us about the natural world? ↓ More info, videos, an
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These Places Have No Scientific Explanation!!

409 views / 1 likes - added 3 years ago

Radioactive lakes, rivers that can boil you alive, and lakes that turn things to stone these all sound like something straight out of a sci-fi fantasy, but theyre real places on Earth and today were going to take you there: Number 7. Shanay-Timpishka The
02:37 Popular
How far back in time could you go and still understand English?

1,139 views / 3 likes - added 8 years ago

If you had a time machine, how far back could you go and still understand English? AT what point in history would you not be able to understand the English language? If you went back in time to the 1800's and 1700's, you'd probably still be okay. This exc
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11:01 Popular
Is There Life on Mars?

1,259 views / 0 likes - added 7 years ago

You know what would be exciting? Finding life on Mars. What is the best evidence we’ve seen for life on the Red Planet? References: http://mars.nasa.gov/programmissions/missions/past/viking/ http://www.astrobio.net/news-exclusive/potential-signs-ancient-l
07:50 Popular
Why is Area 51 Called That?

753 views / 2 likes - added 7 years ago

→Subscribe for new videos every day! https://www.youtube.com/user/TodayIFoundOut?sub_confirmation=1 →How "Dick" came to be short for 'Richard': https://youtu.be/BH1NAwwKtcg?list=PLR0XuDegDqP2Acy6g9Ta7hzC0Rr3RDS6q Never run out of things to say at the wate
03:48
What Is The Best Shape For A Farm?

99 views / 0 likes - added 8 months ago

This video was made in partnership with Gates Ventures.The shape of a farm can tell you a surprising amount about the land it's on and the people that use it.LEARN MORE**************To learn more about this topic, start your googling with these keywords:
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6 Animals with Extraordinary Adaptations to Cave Life

582 views / 1 likes - added 5 years ago

Living in a cave isn’t easy, but these six cave-dwelling animals have gained some amazing traits to help them survive there! Hosted by: Michael Aranda Head to https://scishowfinds.com/ for hand selected artifacts of the universe! ---------- Support SciSho
03:06
UPSIDE-DOWN Rivers On Mars?! (Response to MinutePhysics)

579 views / 1 likes - added 6 years ago

Get your FREE 2-month Skillshare trial: http://skl.sh/minuteearth2 The "Mountain or Valley?" illusion makes our brains turn valleys inside out. But inside-out valleys are a real thing, both on Earth and on Mars. Thanks to Skillshare for sponsoring this vi
05:27 Popular
Can You Solve The Mind-Bending Self-Counting Sentence Riddle?

959 views / 0 likes - added 7 years ago

"In this sentence, the number of occurrences of the digit 0 is __, of the digit 1 is __, of the digit 2 is __, of the digit 3 is __, of the digit 4 is __, of the digit 5 is __, of the digit 6 is __, of the digit 7 is __, of the digit 8 is __, and of the d
14:41
The Evolution Of CPU Processing Power Part 1: The Mechanics Of A CPU

200 views / 0 likes - added 2 years ago

SERIES LINK - https://www.youtube.com/playlist?list=PLC7a8fNahjQ8IkiD5f7blIYrro9oeIfJUIn this multi-part series, we explore the evolution of the microprocessor and its astonishing growth in processing power over the decades. In Part 1, we learn about the
03:36 Popular
Why Can't People Remember Being Born?

749 views / 0 likes - added 8 years ago

You probably remember your 18th birthday, but not your first – or your zeroth. Why is that? Learn more at HowStuffWorks.com: http://science.howstuffworks.com/life/inside-the-mind/human-brain/remember-birth.htm Share on Facebook: https://goo.gl/hiKxeT Shar
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Watch a Seed Sprout! | Squeaks Grows a Garden! | SciShow Kids

105 views / 0 likes - added 1 year ago

Squeaks and Mister Brown are just about ready to start their garden, but first they want to learn all about how the tiny little seeds they'll plant in the ground will grow into vegetables they can eat! And Juniper stops by to explain how you can watch a s
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Why This Train Is The Envy Of The World: The Shinkansen Story

570 views / 0 likes - added 5 years ago

The first 200 viewers to sign up at https://brilliant.org/mustard will get 20% off their annual premium subscription In 1964, Japan unveiled the Shinkansen - a new high speed railway connecting the country’s two largest cities (in the 1960's), Tokyo
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Why This Enormous Plane Really Exists: The An-225 Mriya

278 views / 0 likes - added 3 years ago

Sign up for an annual CuriosityStream subscription and you’ll also get a free Nebula subscription here: http://CuriosityStream.com/mustard The Energia-Buran was the most expensive and ambitious Soviet space project in history. As the Soviet Union&rs
03:39
a Eurovision song created by Artificial Intelligence: Blue Jeans and Bloody Tears

487 views / 1 likes - added 5 years ago

As Europe (together with Australia and Israel) are glued to their TV sets watching the 64th Eurovision song competition, we asked ourselves What makes a Eurovision song memorable? does a Eurovision hit have special DNA? We are a group of artists, musician
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How To Make A Crystal Radio - No Batteries

428 views / 0 likes - added 4 years ago

How to make a robust crystal radio. DIY step by step. No special tools or skills needed. Most parts can be had from recycled things. The purchased parts run about $3. Good during power failures, when batteries are not available, for prepping and similar.
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Proteins: Explained

538 views / 0 likes - added 2 years ago

To start using Tab for a Cause, go to: http://tabforacause.org/minuteearth2You might already know that proteins are a fundamental part of your diet, but they're much more than that.LEARN MORE**************To learn more about this topic, start your googlin
07:18
Why Does the Sun Make You Sneeze?

663 views / 0 likes - added 6 years ago

Tunnel Bear for FREE: http://tunnelbear.com/brainfood If you happen to like our videos and have a few bucks to spare to support our efforts, check out our Patreon page where we've got a variety of perks for our Patrons, including Simon's voice on your GPS

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