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Search Results: "Differential geometry"

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  • 09:31 Around The Corner - How Differential Steering Works (1937)

    Around The Corner - How Differential Steering Works (1937)

    95 views / 0 likes - added

    How the automobile differential allows a vehicle to turn a corner while keeping the wheels from skidding. Differential steering From Wikipedia, the free encyclopedia https://en.wikipedia.org/wiki/Differential_steering Differential steering is the means of

  • 11:03 What is a differential equation

    What is a differential equation

    219 views / 0 likes - added

    What a differential equation is and some terminology.

  • 05:38 Separable differential equations 2

    Separable differential equations 2

    296 views / 0 likes - added

    Another separable differential equation example. More free lessons at: http://www.khanacademy.org/video?v=xVWCfMe97ws

  • 12:01 Separable Differential Equations

    Separable Differential Equations

    254 views / 0 likes - added

    Introduction to separable differential equations. More free lessons at: http://www.khanacademy.org/video?v=C5-lz0hcqsE

  • 09:31 How Differential Gear works (BEST Tutorial)

    How Differential Gear works (BEST Tutorial)

    241 views / 0 likes - added

    An excellent tutorial from the 1930's on the principles and development of the Differential Gear. Fast Forward to 1:50 if you want to skip the intro.

  • 12:59 Simple Differential Equation Example

    Simple Differential Equation Example

    319 views / 0 likes - added

    2010 IIT JEE Paper 1 Problem 56 Differential Equation More free lessons at: http://www.khanacademy.org/video?v=fqnPabGV6A4

  • 19:12 Laplace/Step Function Differential Equation

    Laplace/Step Function Differential Equation

    336 views / 0 likes - added

    Hairy differential equation involving a step function that we use the Laplace Transform to solve. More free lessons at: http://www.khanacademy.org/video?v=R0JY8oWsuOY

  • 09:45 2nd Order Linear Homogeneous Differential Equations 1

    2nd Order Linear Homogeneous Differential Equations 1

    261 views / 0 likes - added

    Introduction to 2nd order, linear, homogeneous differential equations with constant coefficients. More free lessons at: http://www.khanacademy.org/video?v=UFWAu8Ptth0

  • 01:37 Translation Example | Transformations | Geometry | Khan Academy

    Translation Example | Transformations | Geometry | Khan Academy

    324 views / 0 likes - added

    Translation example Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/geometry/transformations/rigid-transformations-intro/e/performing-translations-on-the-coordinate-plane?utm_source=YT&utm_medium=Desc&utm_campa

  • 01:25 Using Rotation Widget | Transformations | Geometry | Khan Academy

    Using Rotation Widget | Transformations | Geometry | Khan Academy

    301 views / 0 likes - added

    Using rotation widget Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/geometry/transformations/rigid-transformations-intro/e/performing-rotations-on-the-coordinate-plane?utm_source=YT&utm_medium=Desc&utm_campai

  • 08:13 Points After Rotation | Transformations | Geometry | Khan Academy

    Points After Rotation | Transformations | Geometry | Khan Academy

    316 views / 1 likes - added

    Points after rotation Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/geometry/transformations/hs-geo-rotations/e/rotations-1?utm_source=YT&utm_medium=Desc&utm_campaign=Geometry Watch the next lesson: https://w

  • 02:46 Defining Rotation Example | Transformations | Geometry | Khan Academy

    Defining Rotation Example | Transformations | Geometry | Khan Academy

    333 views / 0 likes - added

    Defining rotation example Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/geometry/transformations/hs-geo-rotations/e/defining-rotations?utm_source=YT&utm_medium=Desc&utm_campaign=Geometry Watch the next lesson

  • 01:48 Using Reflection Tool | Transformations | Geometry | Khan Academy

    Using Reflection Tool | Transformations | Geometry | Khan Academy

    398 views / 0 likes - added

    Using reflection tool Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/geometry/transformations/rigid-transformations-intro/e/performing-reflections-on-the-coordinate-plane?utm_source=YT&utm_medium=Desc&utm_camp

  • 01:55 Drawing Image Of Translation | Transformations | Geometry | Khan Academy

    Drawing Image Of Translation | Transformations | Geometry | Khan Academy

    345 views / 0 likes - added

    Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/geometry/transformations/hs-geo-translations/e/translations?utm_source=YT&utm_medium=Desc&utm_campaign=Geometry Watch the next lesson: https://www.khanacademy.org

  • 10:32 Rotating About Arbitrary Point | Transformations | Geometry | Khan Academy

    Rotating About Arbitrary Point | Transformations | Geometry | Khan Academy

    317 views / 0 likes - added

    Rotating about arbitrary point Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/geometry/transformations/hs-geo-rotations/e/rotations-2?utm_source=YT&utm_medium=Desc&utm_campaign=Geometry Watch the next lesson:

  • 07:19 Reflecting Segments Over Line | Transformations | Geometry | Khan Academy

    Reflecting Segments Over Line | Transformations | Geometry | Khan Academy

    296 views / 0 likes - added

    Reflecting segments over line Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/geometry/transformations/hs-geo-reflections/e/reflections-1?utm_source=YT&utm_medium=Desc&utm_campaign=Geometry Watch the next lesso

  • 01:32 Formal Translation Tool Example | Transformations | Geometry | Khan Academy

    Formal Translation Tool Example | Transformations | Geometry | Khan Academy

    314 views / 0 likes - added

    Formal translation tool example Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/geometry/transformations/hs-geo-translations/e/defining-translations?utm_source=YT&utm_medium=Desc&utm_campaign=Geometry Watch the

  • 05:41 Points On Line Of Reflection | Transformations | Geometry | Khan Academy

    Points On Line Of Reflection | Transformations | Geometry | Khan Academy

    315 views / 0 likes - added

    Points on line of reflection Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/geometry/transformations/hs-geo-reflections/e/defining-reflections?utm_source=YT&utm_medium=Desc&utm_campaign=Geometry Watch the next

  • 02:28 Drawing Line Of Reflection | Transformations | Geometry | Khan Academy

    Drawing Line Of Reflection | Transformations | Geometry | Khan Academy

    348 views / 0 likes - added

    Drawing line of reflection Watch the next lesson: https://www.khanacademy.org/math/geometry/transformations/hs-geo-reflections/v/determining-the-line-of-reflection?utm_source=YT&utm_medium=Desc&utm_campaign=Geometry Missed the previous lesson? https://www

  • 31:51 Geometry: An Interactive Journey to Mastery | The Great Courses

    Geometry: An Interactive Journey to Mastery | The Great Courses

    299 views / 0 likes - added

    https://www.thegreatcoursesplus.com/geometry-an-interactive-journey-to-mastery?utm_source=US_SocialMedia&utm_medium=SocialMediaEditorialYoutube&utm_campaign=138569 Like other math fields, geometry teaches us how to think. It leads students to uncover new

  • 12:51 I HATE GOING UPSIDE DOWN!!! (Geometry Dash #3)

    I HATE GOING UPSIDE DOWN!!! (Geometry Dash #3)

    687 views / 9 likes - added

    I HATE GOING UPSIDE DOWN!!! (Geometry Dash #3) ► Subscribe and join TeamTDM! :: http://bit.ly/TxtGm8 ► BUY MY NEW BOOK HERE :: http://smarturl.it/DanTDM ► Follow Me on Twitter :: http://www.twitter.com/dantdm ► Previous Video :: https://youtu.be/xRfBMq14Y

  • 10:01 CUSTOM GEOMETRY DASH LEVELS?!?

    CUSTOM GEOMETRY DASH LEVELS?!?

    515 views / 6 likes - added

    ► Subscribe and join TeamTDM! :: http://bit.ly/TxtGm8 ► Follow Me on Twitter :: http://www.twitter.com/dantdm ► Previous Video :: https://youtu.be/ap-7XaMMtH4 i never knew you could get custom geometry dash levels.. ► DanTDM MERCH :: http://www.dantdmshop

  • 07:23 Introduction To Transformations | Transformations | Geometry | Khan Academy

    Introduction To Transformations | Transformations | Geometry | Khan Academy

    306 views / 0 likes - added

    Introduction to transformations Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/geometry/transformations/rigid-transformations-intro/e/performing-translations-on-the-coordinate-plane?utm_source=YT&utm_medium=De

  • 02:04 Non-Euclidean Geometry of a Sphere - Christmas Lectures with Philip Morrison

    Non-Euclidean Geometry of a Sphere - Christmas Lectures with Philip Morrison

    146 views / 0 likes - added

    According to Euclidean geometry the angles of a triangle add up to 180 degrees. Philip Morrison shows an example of where this isn't true, and non-Euclidean geometry applies. Watch the full lecture: http://www.rigb.org/christmas-lectures/watch/1968/gulliv

  • 57:34 Topology, Geometry And Life In Three Dimensions

    Topology, Geometry And Life In Three Dimensions

    319 views / 0 likes - added

    If you imagine a three dimensional maze from which there is no escape, how can you map it? Is there a way to describe what all possible mazes look like, and how do mathematicians set about investigating them? Subscribe for regular science videos: http://b

  • 08:05 Can You Solve The Hardest Easy Geometry Problem?

    Can You Solve The Hardest Easy Geometry Problem?

    423 views / 1 likes - added

    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

  • 02:04 Compose Shapes | Geometry | Early Math | Khan Academy

    Compose Shapes | Geometry | Early Math | Khan Academy

    313 views / 0 likes - added

    Learn how to combine shapes to make other shapes. Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/early-math/cc-early-math-geometry-topic/cc-early-math-composing-shapes/e/compose-shapes?utm_source=YT&utm_medium

  • 02:25 Halves And Fourths | Geometry | Early Math | Khan Academy

    Halves And Fourths | Geometry | Early Math | Khan Academy

    337 views / 0 likes - added

    Learn how to divide shapes into two or four equal sections. Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/early-math/cc-early-math-geometry-topic/cc-early-math-fractions-of-shapes/e/halves-and-fourths?utm_sou

  • 06:09 Recognizing Shapes | Geometry | Early Math | Khan Academy

    Recognizing Shapes | Geometry | Early Math | Khan Academy

    349 views / 0 likes - added

    Learn how to identify circles, triangles, squares, rectangles, rhombuses, and trapezoids. Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/early-math/cc-early-math-geometry-topic/cc-early-math-shapes/e/naming-sh

  • 01:31 Filling Rectangles With Squares | Geometry | Early Math | Khan Academy

    Filling Rectangles With Squares | Geometry | Early Math | Khan Academy

    321 views / 0 likes - added

    Learn how to fill rectangles with squares. Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/early-math/cc-early-math-geometry-topic/cc-early-math-fractions-of-shapes/e/filling-rectangles-with-same-sized-squares?

  • 03:51 Can You Solve This MIT Admissions Question? Geometry Problem, 1869

    Can You Solve This MIT Admissions Question? Geometry Problem, 1869

    338 views / 0 likes - added

    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

  • 02:52 Bauhaus Ballet: A Dance of Geometry

    Bauhaus Ballet: A Dance of Geometry

    140 views / 0 likes - added

    The Bauhaus Movement produced more than just minimalist buildings and furniture; it also gave way to a dance of geometry. In his 1922 “Triadic Ballet,” prodigious artist Oskar Schlemmer stripped away the genre’s archetypally fluid movements and fabrics, p

  • 03:05 Equal Parts Of Circles And Rectangles | Geometry | Early Math | Khan Academy

    Equal Parts Of Circles And Rectangles | Geometry | Early Math | Khan Academy

    334 views / 1 likes - added

    Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/early-math/cc-early-math-geometry-topic/cc-early-math-fractions-of-shapes/e/equal-parts-of-circles-and-rectangles?utm_source=YT&utm_medium=Desc&utm_campaign=Early

  • 04:19 Cousin Fal's Shape Collection | Geometry | Early Math | Khan Academy

    Cousin Fal's Shape Collection | Geometry | Early Math | Khan Academy

    261 views / 0 likes - added

    Learn how to classify shapes based on their number of sides, number of corners, and side-lengths. Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/early-math/cc-early-math-geometry-topic/cc-early-math-shapes/e/n

  • 08:28 2nd Order Linear Homogeneous Differential Equations 2

    2nd Order Linear Homogeneous Differential Equations 2

    268 views / 0 likes - added

    Let's find the general solution! More free lessons at: http://www.khanacademy.org/video?v=SPVqgkOZMAc

  • 05:59 2nd Order Linear Homogeneous Differential Equations 3

    2nd Order Linear Homogeneous Differential Equations 3

    252 views / 0 likes - added

    Let's use some initial conditions to solve for the particular solution More free lessons at: http://www.khanacademy.org/video?v=UyCwAFQt4v0

  • 09:11 2nd Order Linear Homogeneous Differential Equations 4

    2nd Order Linear Homogeneous Differential Equations 4

    317 views / 0 likes - added

    Another example with initial conditions! More free lessons at: http://www.khanacademy.org/video?v=3uO_uPb9H8w

  • 04:33 Fractals: The Geometry of Chaos - Christmas Lectures with Ian Stewart

    Fractals: The Geometry of Chaos - Christmas Lectures with Ian Stewart

    135 views / 0 likes - added

    Using a simple set of mathematical rules, a very intricate geometry can be created in the form of fractals. The Sierpinski triangle is a famous example. Subscribe for regular science videos: http://bit.ly/RiSubscRibe Watch the full lecture: http://www.rig

  • 03:43 Right Triangle Geometry — Harder Example | Math | New SAT | Khan Academy

    Right Triangle Geometry — Harder Example | Math | New SAT | Khan Academy

    237 views / 0 likes - added

    Watch Sal work through a harder Right triangle geometry problem. Watch the next lesson: https://www.khanacademy.org/test-prep/new-sat/new-sat-math/new-sat-additional-topics-math/v/sat-math-s4-easier?utm_source=YT&utm_medium=Desc&utm_campaign=NewSAT Missed

  • 08:17 Right Triangle Geometry — Basic Example | Math | New SAT | Khan Academy

    Right Triangle Geometry — Basic Example | Math | New SAT | Khan Academy

    289 views / 0 likes - added

    Watch Sal work through a basic Right triangle geometry problem. Watch the next lesson: https://www.khanacademy.org/test-prep/new-sat/new-sat-math/new-sat-additional-topics-math/v/sat-math-s7-harder?utm_source=YT&utm_medium=Desc&utm_campaign=NewSAT Missed

  • 13:46 Math Videos For 3rd, 4th, And 5th Grade: GEOMETRY MATH SONGS

    Math Videos For 3rd, 4th, And 5th Grade: GEOMETRY MATH SONGS

    508 views / 3 likes - added

    This fun video playlist goes along with a Geometry Unit with matching animation that can be purchased here: Teachers Pay Teachers Geometry Unit: https://www.teacherspayteachers.com/Product/Geometry-Unit-2459996 ◀--- Opens in New Window ____ Our closest fr

  • 09:50 Can You Solve This 6th Grade Geometry Problem From China?

    Can You Solve This 6th Grade Geometry Problem From China?

    610 views / 1 likes - added

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

    Adults Stumped By Geometry Problems For 10 Year Olds. Can You Solve Them?

    358 views / 0 likes - added

    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

  • 08:45 Fractals: How to Decode the Geometry of Chaos І The Great Courses

    Fractals: How to Decode the Geometry of Chaos І The Great Courses

    190 views / 0 likes - added

    Try a free month trial of The Great Courses Plus here: https://www.thegreatcoursesplus.com/special-offer?utm_source=US_OnlineVideo&utm_medium=SocialMediaEditorialYouTube&utm_campaign=136270 Let's begin by clarifying what's distinctive about fractals by co

  • 03:41 Polygons Song For Kids Rap Video: Geometry Quadrilaterals Hexagons etc.

    Polygons Song For Kids Rap Video: Geometry Quadrilaterals Hexagons etc.

    651 views / 0 likes - added

    Full lesson plan and more: http://numberock.com/polygons/ Description: Alan kite surfs, skateboards, bikes, dives, and explores space as he learns about Triangles, Quadrilaterals, Pentagons, Hexagons, Heptagons, Octagons, Nonagons, and Decagons. These sha

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

    Can You Solve This 6th Grade Geometry Problem From Singapore? The Area Of A "Claw"

    530 views / 1 likes - added

    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

  • 03:16 Can You Solve This 8th Grade Geometry Problem? 75% Got The Wrong Answer

    Can You Solve This 8th Grade Geometry Problem? 75% Got The Wrong Answer

    282 views / 0 likes - added

    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.

  • 04:13 Can You Solve This Grade 12 Geometry Problem From Australia? The Marshmallow Chocolate Puzzle

    Can You Solve This Grade 12 Geometry Problem From Australia? The Marshmallow Chocolate Puzzle

    294 views / 0 likes - added

    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

  • 03:59 Movie Geometry - Shaping the Way You Think

    Movie Geometry - Shaping the Way You Think

    125 views / 0 likes - added

    Shapes have meaning. That may sound crazy, but hear me out. Let's explore how cinematographers and directors create shapes inside the frame to add visual storytelling to their films. Twitter: http://bit.ly/1QvLI0H Patreon: http://bit.ly/1UaO9MU Music: htt

  • 02:06 Types of Angles, Figures & Shapes

    Types of Angles, Figures & Shapes

    332 views / 0 likes - added

    Types of Angles, Figures & Shapes. Part of the series: Geometry Tips. many different types of angles, figures and shapes make up math in general as well as geometry. Learn about the types of angles, figures and shapes in geometry with help from a longtime

  • 09:07 Newton Leibniz And Usain Bolt

    Newton Leibniz And Usain Bolt

    273 views / 0 likes - added

    Why we study differential calculus More free lessons at: http://www.khanacademy.org/video?v=EKvHQc3QEow

  • 12:10 Exact Equations Example 1

    Exact Equations Example 1

    237 views / 0 likes - added

    First example of solving an exact differential equation. More free lessons at: http://www.khanacademy.org/video?v=Pb04ntcDJcQ

  • 12:32 Protecting Privacy with MATH (Collab with the Census)

    Protecting Privacy with MATH (Collab with the Census)

    48 views / 0 likes - added

    This video was made in collaboration with the US Census Bureau and fact-checked by Census Bureau scientists. Any opinions and errors are my own. For more information, visit https://census.gov/about/policies/privacy/statistical_safeguards.html or search "d

  • 10:46 Laplace Transform solves an equation 2

    Laplace Transform solves an equation 2

    248 views / 0 likes - added

    Second part of using the Laplace Transform to solve a differential equation. More free lessons at: http://www.khanacademy.org/video?v=EdQ7Q9VoF44

  • 18:48 Using the Laplace Transform to solve a nonhomogenous eq

    Using the Laplace Transform to solve a nonhomogenous eq

    214 views / 0 likes - added

    Solving a non-homogeneous differential equation using the Laplace Transform More free lessons at: http://www.khanacademy.org/video?v=nlUG4OKN1IY

  • 10:17 Integrating factors 1

    Integrating factors 1

    222 views / 0 likes - added

    Using an integrating factor to make a differential equation exact More free lessons at: http://www.khanacademy.org/video?v=j511hg7Hlbg

  • 08:23 First order homogenous equations 2

    First order homogenous equations 2

    260 views / 0 likes - added

    Another example of using substitution to solve a first order homogeneous differential equations. More free lessons at: http://www.khanacademy.org/video?v=6YRGEsQWZzY

  • 08:52 Repeated roots of the characterisitic equations part 2

    Repeated roots of the characterisitic equations part 2

    227 views / 0 likes - added

    An example where we use initial conditions to solve a repeated-roots differential equation. More free lessons at: http://www.khanacademy.org/video?v=YezsgIlcb68

  • 10:11 Undetermined Coefficients 1

    Undetermined Coefficients 1

    245 views / 0 likes - added

    Using the method of undetermined coefficients to solve nonhomogeneous linear differential equations. More free lessons at: http://www.khanacademy.org/video?v=znE4Nq9NJCQ

  • 09:50 A Hole in a Hole in a Hole - Numberphile

    A Hole in a Hole in a Hole - Numberphile

    255 views / 0 likes - added

    Audible: http://www.audible.com/numberphile Cliff's glassware: http://bit.ly/ACME_Klein Extras for this video: https://youtu.be/6Qpfv5y-7WU More Cliff: http://bit.ly/Cliff_Videos Cliff references A Comprehensive Introduction to Differential Geometry by Mi

  • 09:46 Harmonic Motion Part 2 (calculus)

    Harmonic Motion Part 2 (calculus)

    225 views / 0 likes - added

    We test whether Acos(wt) can describe the motion of the mass on a spring by substituting into the differential equation F=-kx More free lessons at: http://www.khanacademy.org/video?v=xoUppFlif04

  • 08:50 Visual Pythagorean Theorem Proof

    Visual Pythagorean Theorem Proof

    353 views / 0 likes - added

    Visual Pythagorean Theorem Proof - some basic geometry required

  • 18:18 2003 AIME II Problem 14

    2003 AIME II Problem 14

    310 views / 0 likes - added

    Trigonometry and geometry to find the area of an equilateral (but not regular) hexagon More free lessons at: http://www.khanacademy.org/video?v=Ec-BKdC8vOo

  • 03:34 How Sound Works (In Rooms)

    How Sound Works (In Rooms)

    60 views / 0 likes - added

    Acoustic Geometry shows how sound works in rooms using Nerf Disc guns, 1130 feet of fluorescent green string, and Moiré patterns, and a before-and-after example.

  • 59:52 The Extraordinary Theorems of John Nash - with Cédric Villani

    The Extraordinary Theorems of John Nash - with Cédric Villani

    205 views / 0 likes - added

    Fields medal winner Cédric Villani takes us through the very special world of mathematical creation of John Nash, who founded several new chapters of game theory and geometric analysis in just a few revolutionary contributions that seemed to come from now

  • 02:43 The Man Teaching Math Lessons in the Sky

    The Man Teaching Math Lessons in the Sky

    115 views / 0 likes - added

    Winfred Randolph Lowe, aka, “Randy the Kite Man,” is a retired math teacher taking geometry to new heights. For the past 20 years, Winfred has spent his free time flying kites. Now he’s combining his two favorite pastimes to teach the fundamentals of geom

  • 03:19 Why Do Ice Cubes Crack In Drinks? (SLOW MOTION)

    Why Do Ice Cubes Crack In Drinks? (SLOW MOTION)

    300 views / 0 likes - added

    Dropping ice cubes in water (and liquid nitrogen) produce interesting results. Differential expansion. More slow motion from periodic videos: http://bit.ly/chemslomo Follow us on Facebook at http://www.facebook.com/periodicvideos More chemistry at http://

  • 07:34 Pixar: The Math Behind The Movies - Tony DeRose

    Pixar: The Math Behind The Movies - Tony DeRose

    295 views / 0 likes - added

    View full lesson: http://ed.ted.com/lessons/pixar-the-math-behind-the-movies-tony-derose The folks at Pixar are widely known as some of the world's best storytellers and animators. They are perhaps less recognized as some of the most innovative math whizz

  • 03:54 Why Are Most Galaxies Spiral-Shaped?

    Why Are Most Galaxies Spiral-Shaped?

    233 views / 0 likes - added

    The structure of spiral galaxies is more complex than we thought. Here's how the laws of physics contribute to the shaping of galaxies. Everything We Know About The Andromeda Galaxy - http://bit.ly/2blkOkG Sign Up For The Seeker Newsletter Here - http://b

  • 03:22 ballet rotoscope

    ballet rotoscope

    278 views / 0 likes - added

    This work is an experimental video created from a research about "Rotoscope" and “Computer Geometry”. Rotoscope is known as an traditional technique for creating animation invented in 1905 by Max Fleischer in which animators traced the actors

  • 03:46 Five things you didn't know about the Moon

    Five things you didn't know about the Moon

    238 views / 1 likes - added

    First photos of the Moon... EVER. Lunar volcanoes! (Yes, the Moon used to have active volcanoes.) The wheels NASA built for the first moon rover. Oh, did you know the Moon is moving away from us? And the Moon has over 400,000 pounds of Earth stuff on it (

  • 03:59 Why Do Honeybees Love Hexagons? - Zack Patterson And Andy Peterson

    Why Do Honeybees Love Hexagons? - Zack Patterson And Andy Peterson

    322 views / 0 likes - added

    View full lesson: http://ed.ted.com/lessons/why-do-honeybees-love-hexagons-zack-patterson-and-andy-peterson Honeybees are some of nature's finest mathematicians. Not only can they calculate angles and comprehend the roundness of the earth, these smart ins

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  • 04:53 We Taught an AI To Synthesize Materials | Two Minute Papers #251

    We Taught an AI To Synthesize Materials | Two Minute Papers #251

    182 views / 0 likes - added

    The paper "Gaussian Material Synthesis" and its source code is available here: https://users.cg.tuwien.ac.at/zsolnai/gfx/gaussian-material-synthesis/ Our Patreon page: https://www.patreon.com/TwoMinutePapers We would like to thank our generous Patreon sup

  • 13:13 New 1, 2, 3, 4 Stories About Math

    1, 2, 3, 4 Stories About Math

    15 views / 0 likes - added

    From geometry to personal finance, there is one common denominator that links the stories in this reelthey are all about math.SUBSCRIBE: https://goo.gl/vR6AcbThis story is a part of our Human Condition series. Come along and let us connect you to some of

  • 10:03 Four has Four Letters

    Four has Four Letters

    207 views / 0 likes - added

    Four is the only number in the English language which as as many letters as its value. Leave your findings below and please do comment (constructively!) on the findings of others. Here is the python code I used to track which binary sequences ended in 13

  • 03:39 What Is The Shape of Space?

    What Is The Shape of Space?

    157 views / 0 likes - added

    A collaboration with Jorge Cham and Daniel Whiteson, check out "We Have No Idea" at http://www.wehavenoidea.com Jorge's PhDComics: http://www.phdcomics.com Numberphile video about sports in hyperbolic space: https://www.youtube.com/watch?v=u6Got0X41pY Sup

  • 11:23 Dark Energy, Cosmology Part 2: Crash Course Astronomy #43

    Dark Energy, Cosmology Part 2: Crash Course Astronomy #43

    252 views / 0 likes - added

    The majority of the universe is made up of a currently mysterious entity that pervades space: dark energy. We don’t know exactly what it is, but we do know that dark energy accelerates the expansion of space. We think this means the Universe will expand f

  • 07:43 How To Trisect An Angle With Origami - Numberphile

    How To Trisect An Angle With Origami - Numberphile

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  • 32:44 The Power of Mathematical Visualization | The Great Courses

    The Power of Mathematical Visualization | The Great Courses

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  • 15:21 What Physics Teachers Get Wrong About Tides! | Space Time | PBS Digital Studios

    What Physics Teachers Get Wrong About Tides! | Space Time | PBS Digital Studios

    266 views / 0 likes - added

    Tweet at us! @pbsspacetime Facebook: facebook.com/pbsspacetime Email us! pbsspacetime [at] gmail [dot] com Comment on Reddit: http://www.reddit.com/r/pbsspacetime We all know tides have something to do with gravity from the Moon and Sun, but if gravity af

  • 12:41 Why The Universe Needs Dark Energy | Space Time | PBS Digital Studios

    Why The Universe Needs Dark Energy | Space Time | PBS Digital Studios

    227 views / 1 likes - added

    Check out our sister channel Crash Course Physics to learn more about the basic foudations of Physics: https://www.youtube.com/watch?v=ZM8ECpBuQYE&list=PL8dPuuaLjXtN0ge7yDk_UA0ldZJdhwkoV Get your own Space Time t-shirt at http://bit.ly/1QlzoBi Tweet at us

  • 02:32 Yes, Your Headache Is Worse Than All Other Aches and Pains, Here’s Why

    Yes, Your Headache Is Worse Than All Other Aches and Pains, Here’s Why

    187 views / 0 likes - added

    Why do headaches seem to hurt worse than any other type of pain? Scientists have an answer and it has to do with your emotions. Why Men Never Get Over A Breakup - https://youtu.be/lCSjuylaYUk Read More: A craniofacial-specific monosynaptic circuit enables

  • 05:17 How many ways are there to prove the Pythagorean theorem? - Betty Fei

    How many ways are there to prove the Pythagorean theorem? - Betty Fei

    248 views / 0 likes - added

    Check out our Patreon page: https://www.patreon.com/teded View full lesson: https://ed.ted.com/lessons/how-many-ways-are-there-to-prove-the-pythagorean-theorem-betty-fei What do Euclid, 12-year-old Einstein, and American President James Garfield have in c

  • 04:52 The Man Who Corrected Einstein

    The Man Who Corrected Einstein

    51 views / 0 likes - added

    Sign up for Brilliant FOR FREE at http://brilliant.org/minutephysics - the first 200 people get 20% of a premium subscription.This video is about how Russian physicist Aleksandr Fridman corrected Albert Einstein about the expansion of the universe. Einste

  • 04:50 Why is Relativity Hard? | Special Relativity Chapter 1

    Why is Relativity Hard? | Special Relativity Chapter 1

    157 views / 0 likes - added

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  • 01:51 Why Are Plane Windows Round?

    Why Are Plane Windows Round?

    233 views / 0 likes - added

    We often learn the most from our failures, this is particularly true for advancements in the field of engineering. Unfortunately for the engineers in the aviation industry, the prices to pay for failure are high. This will be a reoccurring theme in my vid

  • 05:06 How Do Maglev Trains Work? - Christmas Lectures with Leonard Maunder

    How Do Maglev Trains Work? - Christmas Lectures with Leonard Maunder

    104 views / 0 likes - added

    Maglev stands for magnetic levitation which is how these trains hover and are pushed along the tracks. Subscribe for regular science videos: http://bit.ly/RiSubscRibe While only three countries currently have operational maglev trains, China, Japan and So

  • 08:29 Why Don’t We Have a Photo of a Black Hole Yet?

    Why Don’t We Have a Photo of a Black Hole Yet?

    193 views / 1 likes - added

    Wondering where the Event Horizon Telescope is at with the world's first photo of a black hole? So are we. We headed back to MIT Haystack Observatory to find out. Read More: Event Horizon Telescope https://eventhorizontelescope.org/ MIT Haystack Observato

  • 03:48 Popular Will This Hypnotize You?

    Will This Hypnotize You?

    824 views / 4 likes - added

    Is hypnosis real? Here's the science! Watch us get hypnotized: https://youtu.be/LtElP2x5hCM SUBSCRIBE: http://bit.ly/asapsci Written by Rachel Salt, Gregory Brown and Mitchell Moffit GET THE ASAPSCIENCE BOOK: http://asapscience.com/book/ FOLLOW US! Instag

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  • 08:27 Spinning Sphere of Sodium Simulate Earth's Magnetic Field

    Spinning Sphere of Sodium Simulate Earth's Magnetic Field

    206 views / 0 likes - added

    An experiment on how turbulent convection in Earth's core makes a magnetic field Get a free audiobook with a free 30 day trial at http://www.audible.com/Veritasium or text Veritasium to 500-500 Huge thanks to Prof. Dan Lathrop and team: http://ve42.co/Lat

  • 18:44 A Dragon Torched My Hand (How Do VR Haptic Gloves Work?) - Smarter Every Day 191

    A Dragon Torched My Hand (How Do VR Haptic Gloves Work?) - Smarter Every Day 191

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    Click here to subscribe: http://bit.ly/Subscribe2SED Get a personalized DNA genotype test a&d read about new data FDA now allows 23andMe to release: http://www.23andme.com/smarter ⇊ Click below for more links! ⇊ There are tons of things I had never consid

  • 04:51 The Fourth State of Matter Could Scrub Viruses From The Air

    The Fourth State of Matter Could Scrub Viruses From The Air

    100 views / 0 likes - added

    Using cold plasma as an air purifier is not only safe, but can eliminate 99.9% of a test virus from the air...in a fraction of a second! According to research from University of Michigan, here's how it works.What Happens When a Human Gets Rabies? - https:

  • 08:27 Math Tricks and the Joy of Math I The Great Courses

    Math Tricks and the Joy of Math I The Great Courses

    239 views / 0 likes - added

    Try a free month trial of The Great Courses Plus and watch Joy of Mathematics here: https://www.thegreatcoursesplus.com/special-offer?utm_source=US_OnlineVideo&utm_medium=SocialMediaEditorialYouTube&utm_campaign=136229 Welcome to the Joy of Math. I'm Arth

  • 01:18 Can You Make 4 Triangles From 6 Matches?

    Can You Make 4 Triangles From 6 Matches?

    452 views / 0 likes - added

    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

  • 04:31 Counting American Coins | Measurement And Data | Early Math | Khan Academy

    Counting American Coins | Measurement And Data | Early Math | Khan Academy

    298 views / 0 likes - added

    Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/early-math/cc-early-math-measure-data-topic/cc-early-math-money/v/counting-dollars?utm_source=YT&utm_medium=Desc&utm_campaign=EarlyMath Watch the next lesson: htt

  • 03:47 What Is the Shape of the Universe?

    What Is the Shape of the Universe?

    232 views / 0 likes - added

    Unlike the Earth, the universe might actually be flat! But how do scientists know that, if we can’t observe it? Get 20% off http://www.domain.com domain names and web hosting when you use coupon code SEEKER at checkout! Read More: What is the Shape of the

  • 04:22 Impossible Algebra Problem

    Impossible Algebra Problem

    540 views / 0 likes - added

    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

  • 01:44 Interpreting Two-way Tables | Data And Modeling | 8th Grade | Khan Academy

    Interpreting Two-way Tables | Data And Modeling | 8th Grade | Khan Academy

    305 views / 0 likes - added

    Learn how to read two-way tables. Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/early-math/cc-early-math-counting-topic/cc-early-math-counting/v/counting-with-small-numbers?utm_source=YT&utm_medium=Desc&utm_c

  • 03:25 Popular Can You Solve This? AA + BB + CC = ABC

    Can You Solve This? AA + BB + CC = ABC

    741 views / 0 likes - added

    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

  • 04:42 How Warren Buffett Tried To Trick Bill Gates In A Dice Game

    How Warren Buffett Tried To Trick Bill Gates In A Dice Game

    268 views / 0 likes - added

    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

  • 04:01 Comparing Values With Calculator | Numbers And Operations | 8th Grade | Khan Academy

    Comparing Values With Calculator | Numbers And Operations | 8th Grade | Khan Academy

    333 views / 0 likes - added

    Learn how to compare 22.9% to √0.45 using a calculator. Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/cc-eighth-grade-math/cc-8th-numbers-operations/cc-8th-approximating-irrational-numbers/e/approximating-irr

  • 05:57 How To Split A Cake Fairly Using Math

    How To Split A Cake Fairly Using Math

    321 views / 0 likes - added

    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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  • 02:41 Multiplying Multiples Of Powers Of 10 | Numbers And Operations | 8th Grade | Khan Academy

    Multiplying Multiples Of Powers Of 10 | Numbers And Operations | 8th Grade | Khan Academy

    303 views / 0 likes - added

    Learn how to multiply (9 * 10^9) (-2 * 10^-3). Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/cc-eighth-grade-math/cc-8th-numbers-operations/cc-8th-orders-of-magnitude/e/orders-of-magnitude?utm_source=YT&utm_m

  • 04:10 Approximating With Powers Of 10 | Numbers And Operations | 8th Grade | Khan Academy

    Approximating With Powers Of 10 | Numbers And Operations | 8th Grade | Khan Academy

    305 views / 0 likes - added

    Learn how to approximate how much larger the world population was than the US population in 2014. Practice this lesson yourself on KhanAcademy.org right now: https://www.khanacademy.org/math/cc-eighth-grade-math/cc-8th-numbers-operations/cc-8th-orders-of-

  • 02:08 Why Do Birds Migrate Like This?

    Why Do Birds Migrate Like This?

    267 views / 0 likes - added

    Buy the book: "Where the Animals Go: Tracking Wildlife with Technology in 50 Maps and Graphics" at http://www.wheretheanimalsgo.com Copyright 2016 by James Cheshire and Oliver Uberti. First American Edition published by W. W. Norton & Company, Inc. in 201

  • 01:57 I Will Read Your Mind - Math Magic Trick

    I Will Read Your Mind - Math Magic Trick

    546 views / 1 likes - added

    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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  • 07:52 Find The 10 Digit Number Classic Puzzle And Solution

    Find The 10 Digit Number Classic Puzzle And Solution

    296 views / 0 likes - added

    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:

  • 06:24 The Seemingly Impossible Escape Logic Puzzle

    The Seemingly Impossible Escape Logic Puzzle

    524 views / 0 likes - added

    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

  • 03:00 Multiply Numbers By Drawing Lines

    Multiply Numbers By Drawing Lines

    289 views / 0 likes - added

    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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  • 09:19 Can You Trust Your Eyes In Spacetime? | Space Time | PBS Digital Studios

    Can You Trust Your Eyes In Spacetime? | Space Time | PBS Digital Studios

    237 views / 0 likes - added

    What can you trust in Spacetime? Tweet at us! @pbsspacetime Facebook: facebook.com/pbsspacetime Email us! pbsspacetime [at] gmail [dot] com Comment on Reddit: http://www.reddit.com/r/pbsspacetime Last time we talked about what curvature means, looked at g

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

    TOUGH Interview Question - Ways To Give 11 Coins To 3 People

    260 views / 0 likes - added

    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

  • 04:52 Can You Solve The Two Rope Puzzle?

    Can You Solve The Two Rope Puzzle?

    295 views / 0 likes - added

    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

  • 06:24 Can You Solve The Chameleon Riddle?

    Can You Solve The Chameleon Riddle?

    391 views / 0 likes - added

    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

  • 02:50 Why Some Molecules Have Evil Twins

    Why Some Molecules Have Evil Twins

    245 views / 0 likes - added

    A tiny change in a molecule’s geometry completely changes its effects on the human body. How We Made This Video (Ever & David Talk About Drugs): https://youtu.be/tefxgYP0BVM Thanks also to our supporters on https://www.patreon.com/MinuteEarth ____________

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  • 10:20 SURPRISING Coin Flipping Probability - Flips To HH Versus HT

    SURPRISING Coin Flipping Probability - Flips To HH Versus HT

    225 views / 0 likes - added

    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

  • 02:57 Viral Facebook Math Problem

    Viral Facebook Math Problem

    405 views / 1 likes - added

    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

  • 05:41 Scientists Trapped Electrons In a Quantum Fractal (And It's Wild!)

    Scientists Trapped Electrons In a Quantum Fractal (And It's Wild!)

    61 views / 0 likes - added

    Fractals aren’t just crazy cool mathematically infinite shapes. They might just have the capacity to revolutionize modern electronics as we know it. Thumbnail image courtesy of Sander Kempkes. There’s a Subterranean Biosphere Hiding in the Earth’s Crust a

  • 08:27 Can You Solve The 3 Cards Riddle?

    Can You Solve The 3 Cards Riddle?

    298 views / 0 likes - added

    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 How Logical Are You? The Irrationality Illusion Tricks Most

    How Logical Are You? The Irrationality Illusion Tricks Most

    425 views / 0 likes - added

    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

  • 02:45 The Day After Tomorrow Is Yesterday Riddle. Can You Solve It?

    The Day After Tomorrow Is Yesterday Riddle. Can You Solve It?

    306 views / 0 likes - added

    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

  • 02:23 This SAT Math Question Has A Mistake

    This SAT Math Question Has A Mistake

    278 views / 0 likes - added

    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

  • 03:33 Can You Solve This Intelligence Test? Viral Facebook Puzzle

    Can You Solve This Intelligence Test? Viral Facebook Puzzle

    302 views / 0 likes - added

    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

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

    When Is Christmas? Mentally Convert Date To Day Of The Week

    234 views / 0 likes - added

    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

  • 05:09 Can You Solve The Snake Eyes Probability Riddle?

    Can You Solve The Snake Eyes Probability Riddle?

    352 views / 0 likes - added

    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

  • 05:55 "Impossible" Logic Puzzle - How Many Liars Are At The Party?

    "Impossible" Logic Puzzle - How Many Liars Are At The Party?

    338 views / 0 likes - added

    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

  • 07:49 Can You Solve The Viral 9 = 72 Puzzle? The Correct Answer Explained

    Can You Solve The Viral 9 = 72 Puzzle? The Correct Answer Explained

    435 views / 0 likes - added

    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

  • 05:39 Can You Solve A 5th Grade Problem From China? Find The Area Of ABCD

    Can You Solve A 5th Grade Problem From China? Find The Area Of ABCD

    333 views / 0 likes - added

    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

  • 15:15 Moving Faster Than The Speed Of Light? Special Relativity Velocity Addition Formula

    Moving Faster Than The Speed Of Light? Special Relativity Velocity Addition Formula

    303 views / 0 likes - added

    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 Can You Solve The Friendship Riddle?

    Can You Solve The Friendship Riddle?

    220 views / 0 likes - added

    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

  • 06:01 Popular Can You Solve The Viral 1 + 4 = 5 Puzzle? The Correct Answer Explained

    Can You Solve The Viral 1 + 4 = 5 Puzzle? The Correct Answer Explained

    2,587 views / 0 likes - added

    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

  • 02:07 Perimeter & Area Song │ 3rd Grade Math Video For Elementary School Students

    Perimeter & Area Song │ 3rd Grade Math Video For Elementary School Students

    528 views / 0 likes - added

    1. Perimeter & Area Lesson: https://www.teacherspayteachers.com/Product/Perimeter-and-Area-Worksheets-Word-Problems-Quiz-Homework-Music-Video--2429557 ◀--- Opens in New Window 2. LIMITED TIME OFFER! Save 80% by buying our complete collection: https://www.

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

    Comparing Decimals Example 1 | Decimals | 4th Grade | Khan Academy

    296 views / 1 likes - added

    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

  • 05:38 Decimals As Words | Decimals | 4th Grade | Khan Academy

    Decimals As Words | Decimals | 4th Grade | Khan Academy

    276 views / 0 likes - added

    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

  • 03:21 Can You Solve A Puzzle That Fooled Richard Feynman?

    Can You Solve A Puzzle That Fooled Richard Feynman?

    249 views / 0 likes - added

    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

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

    Flower Math Problem - Adults Stumped By Question For Kids In China

    414 views / 2 likes - added

    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

  • 01:49 This Matchstick Puzzle Is

    This Matchstick Puzzle Is

    288 views / 1 likes - added

    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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  • 02:32 Comparing Fractions Visually With Pies | Fractions | 4th Grade | Khan Academy

    Comparing Fractions Visually With Pies | Fractions | 4th Grade | Khan Academy

    305 views / 0 likes - added

    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

  • 03:40 Comparing Decimals Visually Example | 4th Grade | Khan Academy

    Comparing Decimals Visually Example | 4th Grade | Khan Academy

    299 views / 0 likes - added

    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=

  • 02:55 Comparing Fractions On A Number Line | Fractions | 4th Grade | Khan Academy

    Comparing Fractions On A Number Line | Fractions | 4th Grade | Khan Academy

    359 views / 0 likes - added

    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&

  • 03:17 Can YOU Solve It? This Question Stumped 75% Of PhD Economists

    Can YOU Solve It? This Question Stumped 75% Of PhD Economists

    258 views / 0 likes - added

    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

  • 05:48 What Is The Area? "You Should Be Able To Solve This"

    What Is The Area? "You Should Be Able To Solve This"

    144 views / 0 likes - added

    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

  • 06:55 Place Value For Decimals Greater Than One (examples) | 4th Grade | Khan Academy

    Place Value For Decimals Greater Than One (examples) | 4th Grade | Khan Academy

    295 views / 0 likes - added

    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

  • 07:25 Can You Solve The Race To December 31 Riddle?

    Can You Solve The Race To December 31 Riddle?

    292 views / 0 likes - added

    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

  • 04:08 Plotting Decimal Numbers On A Number Line (examples) | Khan Academy

    Plotting Decimal Numbers On A Number Line (examples) | Khan Academy

    273 views / 0 likes - added

    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_

  • 13:40 BEST Way To Play Memory (Card Game) - WIN Using Math

    BEST Way To Play Memory (Card Game) - WIN Using Math

    460 views / 0 likes - added

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

    Decimal Intuition With Grids (examples) | Decimals | 4th Grade | Khan Academy

    329 views / 0 likes - added

    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-

  • 04:37 Fraction-decimal Intuition Problems (examples) | 4th Grade | Khan Academy

    Fraction-decimal Intuition Problems (examples) | 4th Grade | Khan Academy

    287 views / 0 likes - added

    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 Comparing Numbers Represented In Different Ways | 4th Grade | Khan Academy

    Comparing Numbers Represented In Different Ways | 4th Grade | Khan Academy

    286 views / 0 likes - added

    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

  • 09:11 Can You Solve The Rectangle Ratio Puzzle? The Surprising Answer

    Can You Solve The Rectangle Ratio Puzzle? The Surprising Answer

    361 views / 0 likes - added

    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

  • 08:19 Can You Solve The Spies Sharing Secrets Puzzle?

    Can You Solve The Spies Sharing Secrets Puzzle?

    247 views / 0 likes - added

    After a successful mission, each of N spies obtains a unique secret. By protocol, the spies share secrets by a series of phone calls between 2 spies at a time. During a call, a spy can share all the secrets the knows, including secrets learned from previo

  • 02:35 Comparing Fractions Visually With A Bar | Fractions | 4th Grade | Khan Academy

    Comparing Fractions Visually With A Bar | Fractions | 4th Grade | Khan Academy

    279 views / 0 likes - added

    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

  • 06:24 Can You Solve The Missing Sock Puzzle?

    Can You Solve The Missing Sock Puzzle?

    242 views / 0 likes - added

    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

  • 03:48 Can You Solve This Harvard Admissions Question? Algebra Problem, 1869

    Can You Solve This Harvard Admissions Question? Algebra Problem, 1869

    338 views / 0 likes - added

    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

  • 11:27 Can You Solve The Viral 11x11 = 4 Puzzle? The Correct Answer Explained

    Can You Solve The Viral 11x11 = 4 Puzzle? The Correct Answer Explained

    640 views / 1 likes - added

    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

  • 06:06 Equivalent Fractions And Different Wholes | Fractions | 4th Grade | Khan Academy

    Equivalent Fractions And Different Wholes | Fractions | 4th Grade | Khan Academy

    346 views / 0 likes - added

    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-

  • 04:11 Decomposing Hundredths Into Tenths And Hundredths | 4th Grade | Khan Academy

    Decomposing Hundredths Into Tenths And Hundredths | 4th Grade | Khan Academy

    309 views / 0 likes - added

    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

  • 05:13 Real Star Trek Like Transporter. Why This 3D Light Printer Is A HUGE Game Changer

    Real Star Trek Like Transporter. Why This 3D Light Printer Is A HUGE Game Changer

    88 views / 0 likes - added

    Computed Axial Lithography is the first printer of it's kind. It can shape objects, all-at-once, using specialized synthetic resin and rays of light. We Can Now 3D Print in Suspended Gravity (And It’s Mesmerizing!) - https://youtu.be/FgCedvTbKso Read More

  • 02:51 The Horse Horseshoe Boots Viral Algebra Problem - The Correct Answer Explained

    The Horse Horseshoe Boots Viral Algebra Problem - The Correct Answer Explained

    609 views / 1 likes - added

    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:

  • 05:33 What is 6÷2(1+2) = ? The Correct Answer Explained

    What is 6÷2(1+2) = ? The Correct Answer Explained

    483 views / 0 likes - added

    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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  • 05:26 Can You Solve The Red Ball Lottery Puzzle?

    Can You Solve The Red Ball Lottery Puzzle?

    264 views / 0 likes - added

    (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

  • 01:47 Decompose Hundredths On Number Line | Fractions | 4th Grade | Khan Academy

    Decompose Hundredths On Number Line | Fractions | 4th Grade | Khan Academy

    542 views / 0 likes - added

    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

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

    Can You Solve The Marriage Logic Problem? 80% Fail

    272 views / 0 likes - added

    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

  • 04:20 Visually Converting From Tenths To Hundredths | 4th Grade | Khan Academy

    Visually Converting From Tenths To Hundredths | 4th Grade | Khan Academy

    300 views / 0 likes - added

    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

  • 03:54 What's The Best Soup Can Size? The Optimal Cylinder Puzzle

    What's The Best Soup Can Size? The Optimal Cylinder Puzzle

    259 views / 0 likes - added

    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

  • 07:40 Can You Solve The 21 Flags Game From Survivor?

    Can You Solve The 21 Flags Game From Survivor?

    270 views / 0 likes - added

    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

  • 07:21 Can You Solve The Magical Pond Puzzle?

    Can You Solve The Magical Pond Puzzle?

    311 views / 1 likes - added

    (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 Adults Stumped By Maths Questions For 15 Year Olds. Can You Solve Them?

    Adults Stumped By Maths Questions For 15 Year Olds. Can You Solve Them?

    323 views / 0 likes - added

    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

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

    Can You Solve This Crazy Equation? Ramanujan's Radical Brain Teaser

    309 views / 0 likes - added

    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

  • 08:51 The Viral Balloon Puzzle - The REAL Answer Explained (Using Ph.D. Level Math)

    The Viral Balloon Puzzle - The REAL Answer Explained (Using Ph.D. Level Math)

    251 views / 0 likes - added

    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

  • 05:52 Can You Solve The "MEANEST" SAT Test Question Ever?

    Can You Solve The "MEANEST" SAT Test Question Ever?

    281 views / 0 likes - added

    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 Can You Solve The Viral Matchstick Puzzle 6 + 4 = 4?

    Can You Solve The Viral Matchstick Puzzle 6 + 4 = 4?

    492 views / 0 likes - added

    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

  • 06:18 Can You Solve The Diluted Wine Puzzle?

    Can You Solve The Diluted Wine Puzzle?

    269 views / 1 likes - added

    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

  • 08:39 Two Vortex Rings Colliding in SLOW MOTION - Smarter Every Day 195

    Two Vortex Rings Colliding in SLOW MOTION - Smarter Every Day 195

    199 views / 0 likes - added

    This took 4 years to recreate. 12 Hour edit here: https://youtu.be/Cm9l8-qngjM Please subscribe if this video earned it: http://bit.ly/Subscribe2SED Get a free audio book! http://www.audible.com/Smarter ⇊ Click below for more links! ⇊ High Resolution imag

  • 04:30 Adults Are Arguing About This 3rd Grade Math Problem

    Adults Are Arguing About This 3rd Grade Math Problem

    326 views / 0 likes - added

    "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

  • 03:05 Why Do Men Have Deeper Voices?

    Why Do Men Have Deeper Voices?

    300 views / 1 likes - added

    Cristen explains why male humans' voices generally get lower than female humans' during puberty. Learn more at HowStuffWorks.com: http://health.howstuffworks.com/sexual-health/male-reproductive-system/male-puberty2.htm Share on Facebook: https://goo.gl/Hg

  • 11:57 The Wallis Formula For π

    The Wallis Formula For π

    195 views / 0 likes - added

    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 Can You Solve The Probability The Newborn Is A Boy? Many Fail This Interview Question

    Can You Solve The Probability The Newborn Is A Boy? Many Fail This Interview Question

    350 views / 0 likes - added

    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

  • 07:39 Can You Solve The Alien Extinction Riddle? Hard Job Interview Question

    Can You Solve The Alien Extinction Riddle? Hard Job Interview Question

    358 views / 0 likes - added

    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

  • 05:00 How ESAs Dark Energy Telescope Will Map the Dark Universe

    How ESAs Dark Energy Telescope Will Map the Dark Universe

    51 views / 0 likes - added

    ESA is building its first space telescope to investigate how dark energy and dark matter control our universe. Subscribe to Seeker! http://bit.ly/subscribeseeker Watch more Countdown to Launch: http://bit.ly/CTLplaylist Thumbnail Credit: Thales Alenia Spa

  • 02:05 3D SHAPES SONG: Online Education Shape Songs Collection

    3D SHAPES SONG: Online Education Shape Songs Collection

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    Get the Companion Worksheet Set and other Video-Linked Teaching Resources at: Teachers Pay Teachers[http://goo.gl/cfW2G8] TES[http://goo.gl/jXgRhd] SUBSCRIBE TO OUR YOUTUBE CHANNEL: http://goo.gl/3H3bJ6 Learn the definition of various 3-D shapes through e

  • 05:27 Can You Solve The Mind-Bending Self-Counting Sentence Riddle?

    Can You Solve The Mind-Bending Self-Counting Sentence Riddle?

    426 views / 0 likes - added

    "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

  • 02:57 Why Do Rivers Curve?

    Why Do Rivers Curve?

    320 views / 1 likes - added

    We're now on Patreon! Please support us at: http://www.patreon.com/minuteearth Can you find an oxbow lake in GoogleEarth? Share your findings (pictures or coordinates) on Twitter, Facebook and other social media using the hashtag #oxbowlake And subscribe!


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