Brain Teasers

08:11 New
7 Riddles That Will Test Your Brain Power
Added 62 Views / 0 LikesThese 7 Puzzles Will Trick Your Brain. Take this fun test tocheck the sharpness and productivity ofyour brain. Try toanswer these 7questions asquickly aspossible and see the results!  Subscribe to our new channel 'SLICK SLIME SAM'  https://goo.gl/zarV

07:19 New
11 Simple Riddles That Most People Can't Solve
Added 176 Views / 1 Likes12 tricky riddles you probably haven’t heard of. Try to find the right answers to check whether you’re a true genius! Subscribe to Bright Side : https://goo.gl/rQTJZz 
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05:51
Brain Games: Can you outsmart these puzzles?
Added 21 Views / 0 LikesJason Silva, host of National Geographic's program "Brain Games," speaks to the "CBS This Morning" cohosts about using experiments to challenge what we think we know about the brain.

02:48
Brain Teasers  Brain Games
Added 19 Views / 0 LikesComedian Ben Bailey is quizzing people's common sense with a few trick questions. Think you can't be fooled? Listen carefully and play along to find out how you fare. ➡ Subscribe: http://bit.ly/NatGeoSubscribe About Brain Games: Using a series of experime

02:42
Brain Games Challenge: YOU WILL FAIL!
Added 8 Views / 0 LikesBrain teaser having been featured on National Geographic. If you haven't seen it before this might just be impossible! Challenge your friends on Facebook. See the revised version here: https://www.youtube.com/watch?v=BZWSU_uRo Like, Comment, and Subscri

06:35
Only a Genius Can Solve These Riddles in 2 Minutes
Added 84 Views / 1 LikesLogic puzzles are good for people of all ages because they give our minds a chance to limber up. Can you solve each of them in 15 seconds? If so, you can consider yourself a genius (we aren’t – we couldn’t get the last one). Subscribe to Bright Side : htt

07:42
7 Visual Riddles to Test Your Brain Speed
Added 48 Views / 0 LikesOnly a true genius can solve these 7 visual riddles in less than a minute. Subscribe to Bright Side : https://goo.gl/rQTJZz  Our Social Media: Facebook: https://www.fa

10:44
18 Tricky Riddles That'll Stretch Your Brain
Added 111 Views / 1 LikesSubscribe to Bright Side : https://goo.gl/rQTJZz For copyright matters please contact us at: welcome@brightside.me  We've prepared some fun brain teasers that kids cra
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04:01
Can you find the next number in this sequence?  Alex Gendler
Added 75 Views / 0 LikesView full lesson: http://ed.ted.com/lessons/canyoufindthenextnumberinthissequencealexgendler 1, 11, 21, 1211, 111221. These are the first five elements of a number sequence. Can you figure out what comes next? Alex Gendler reveals the answer and

04:50
Can you solve the fish riddle?  Steve Wyborney
Added 286 Views / 1 LikesView full lesson: http://ed.ted.com/lessons/canyousolvethefishriddlestevewyborney As the cargo director on the maiden voyage of the S.S. Buoyant, you’ve agreed to transport several tanks containing the last specimens of an endangered fish species t
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03:44
The Train Bird Problem: What's Your Approach?
Added 51 Views / 0 LikesThe Rest Of Us on Patreon: https://www.patreon.com/TheRestOfUs The Rest Of Us on Twitter: http://twitter.com/TROUchannel The Rest Of Us TShirts and More: http://teespring.com/TheRestOfUsClothing

00:36
How to create chocolate out of nothing
Added 54 Views / 1 LikesDiscover my other interactive magic here: http://www.marianotomatis.com Wanna solve world hunger with magic? This video will teach you how to create chocolate out of nothing. Here the cyclic GIF: http://www.marianotomatis.it/blog/images/20130409a.gif To u

22:41
Calculating the optimal sphere packing density: with oranges
Added 39 Views / 0 LikesCheck out the corresponding video I made with Steve Mould for his channel. https://youtu.be/O3RsDIWB7s0 Thomas Hales’s proof of the Kepler Conjecture. http://annals.math.princeton.edu/wpcontent/uploads/annalsv162n3p01.pdf The Kepler Conjecture on wiki

05:07
Check your intuition: The birthday problem  David Knuffke
Added 144 Views / 0 LikesView full lesson: http://ed.ted.com/lessons/checkyourintuitionthebirthdayproblemdavidknuffke Imagine a group of people. How big do you think the group would have to be before there’s more than a 50% chance that two people in the group have the same
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05:24
Can you solve the pirate riddle?  Alex Gendler
Added 438 Views / 3 LikesView full lesson: http://ed.ted.com/lessons/canyousolvethepirateriddlealexgendler It’s a good day to be a pirate. Amaro and his four mateys – Bart, Charlotte, Daniel, and Eliza have struck gold – a chest with 100 coins. But now, they must divvy up
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05:13
Can you solve the virus riddle?  Lisa Winer
Added 220 Views / 0 LikesView full lesson: http://ed.ted.com/lessons/canyousolvethevirusriddlelisawiner Your research team has found a prehistoric virus preserved in the permafrost and isolated it for study. After a late night working, you’re just closing up the lab when a

01:52
How to Solve a Rubik's Cube  FullTime Kid  PBS Parents
Added 89 Views / 0 LikesWatch Mya [unofficially] break the world record for solving a Rubik's cube, blindfolded! You won't REALLY learn how to solve the puzzle , but you'll learn a neat trick to show your friends and family. Executive Producer: Danielle Steinberg Meet Mya! She'

01:51
Test your math IQ  Part 1
Added 48 Views / 0 LikesTest your math IQ with this fun question. There are two 12 sided coins. Find the measure of the angle when the coins are side by side. Each side of the coin is equal length. My name is Chris and my passion is to teach math. Learning should never be a stru

01:07
The Easiest Brain Teaser You Might Get Wrong
Added 80 Views / 2 LikesTry and solve the easiest brain teaser you might get wrong. The chicken costs $1.00 more than the egg, and together they cost a total of $1.06. How much does the egg cost? My name is Chris and my passion is to teach math. Learning should never be a strugg

01:27
The Easiest Brain Teaser that will rack your brain
Added 104 Views / 0 LikesThis is the easiest brain teaser that will rack your brain. 5 people can build 5 houses in 5 days. How long will it take 100 people to build 100 houses? My name is Chris and my passion is to teach math. Learning should never be a struggle which is why I m

30:07
Mind Bending Math: Riddles and Paradoxes
Added 41 Views / 1 LikesLearn that determining the will of the voters can require a mathematician. Delve into paradoxical outcomes of elections at national, state, and even club levels. Study Kenneth Arrow’s Nobel prizewinning impossibility theorem, and assess the U.S. Electora

04:54
Can you solve the three gods riddle?  Alex Gendler
Added 158 Views / 0 LikesView full lesson: http://ed.ted.com/lessons/canyousolvethethreegodsriddlealexgendler You and your team have crashlanded on an ancient planet. Can you appease the three alien overlords who rule it and get your team safely home? Created by logician

03:29
Mind blowing brain teaser  Folding paper to the moon
Added 79 Views / 0 LikesCan you solve this mind blowing brain teaser? How many times can you fold a piece a paper before it reaches the moon? Find out the solution in this brain teaser in this video. My name is Chris and my passion is to teach math. Learning should never be a st

04:33
Can you solve Zeno's paradox?  Brain Teaser
Added 66 Views / 0 LikesZeno's paradox is one of the most well know math puzzles in history. Is it possible to add an infinite amount of numbers and get an exact value? This is one example of Zeno's paradox. Try and solve this paradox and learn about the Greek philosopher Zeno i

01:36
Are you smart enough to solve this simple brain teaser?
Added 79 Views / 0 LikesThis simple brain teaser is not so easy. A virus is doubling every singe day. On the 67th day the virus has reached its max population. When will the virus reach half of its max population. My name is Chris and my passion is to teach math. Learning should

03:51
Can You Solve This MIT Admissions Question? Geometry Problem, 1869
Added 84 Views / 0 LikesThe 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

08:04
Can you solve the burning stick riddle? ft Simone Giertz part 3/3
Added 62 Views / 0 LikesHow can you time 45 minutes with 2 sticks that each burn for one hour? Simone's channel: https://www.youtube.com/channel/UC3KEoMzNz8eYnwBC34RaKCQ First riddle video: https://www.youtube.com/watch?v=qplG78Guaa4 Second riddle video: https://youtu.be/ri49dTl

06:31
The Boat/Rock Brainteaser ft Simone Giertz part 2/3
Added 56 Views / 0 LikesVideo on Simone's channel! https://www.youtube.com/watch?v=O3G9PuDZ_8c&t=40s Simone's channel: https://www.youtube.com/channel/UC3KEoMzNz8eYnwBC34RaKCQ First riddle video: https://www.youtube.com/watch?v=qplG78Guaa4 0:22  riddle #1  the falling wooden a

04:09
Can you solve these physics riddles? ft Simone Giertz  Part 1/3
Added 64 Views / 0 LikesReading comments on Simone’s channel: https://www.youtube.com/watch?v=O3G9PuDZ_8c Check out Simone’s robots! https://www.youtube.com/simonegiertz Creator: Dianna Cowern Editor: Jabril Ashe Kyle Norby/ Dianna Cowern Thanks to Dan Walsh! Subscribe to Physic

02:41
Trick Question  True or False
Added 142 Views / 0 LikesThink you can answer this simple trick question? Does .9 repeating equal 1? Find the solution in this video. My name is Chris and my passion is to teach math. Learning should never be a struggle which is why I make all my videos as simple and fun as possi
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01:32
Easy Puzzle  But can you solve it?
Added 67 Views / 0 LikesSolve this puzzle by cutting the piece of wood into two pieces. Both pieces must fit exactly into the hole. Can you solve this easy puzzle? Watch the video and find out. My name is Chris and my passion is to teach math. Learning should never be a struggle

04:35
Can you solve the counterfeit coin riddle?  Jennifer Lu
Added 150 Views / 0 LikesView full lesson: http://ed.ted.com/lessons/canyousolvethecounterfeitcoinriddlejenniferlu You’re the realm’s greatest mathematician, but ever since you criticized the Emperor’s tax laws, you’ve been locked in the dungeon. Luckily for you, one of t
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03:16
Can You Solve This 8th Grade Geometry Problem? 75% Got The Wrong Answer
Added 86 Views / 0 LikesWhat is angle A in the starshaped figure? This problem appeared on the 1999 AMC 8 test (intended for 8th grade students in the US). Approximately 75% of testtakers did not mark the correct response. Can you figure it out? Watch the video for a solution.

06:24
Can You Solve The Missing Sock Puzzle?
Added 55 Views / 0 LikesA 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

06:18
Can You Solve The Diluted Wine Puzzle?
Added 58 Views / 1 LikesA 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

04:38
Can you solve the airplane riddle?  Judd A. Schorr
Added 153 Views / 0 LikesView full lesson: http://ed.ted.com/lessons/canyousolvetheairplaneriddlejuddaschorr Professor Fukanō, the famous scientist, has embarked on a new challenge – piloting around the world in a plane of his own design. There’s just one problem: there's

05:27
Can You Solve The MindBending SelfCounting Sentence Riddle?
Added 134 Views / 0 Likes"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

04:13
Can You Solve This Grade 12 Geometry Problem From Australia? The Marshmallow Chocolate Puzzle
Added 78 Views / 0 LikesA 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

07:49
Can You Solve The Viral 9 = 72 Puzzle? The Correct Answer Explained
Added 94 Views / 0 LikesThis 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

04:30
Adults Are Arguing About This 3rd Grade Math Problem
Added 71 Views / 0 Likes"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

09:11
Can You Solve The Rectangle Ratio Puzzle? The Surprising Answer
Added 85 Views / 0 LikesStart 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

02:45
The Day After Tomorrow Is Yesterday Riddle. Can You Solve It?
Added 98 Views / 0 LikesThis 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

07:47
Can You Solve The Probability The Newborn Is A Boy? Many Fail This Interview Question
Added 99 Views / 0 LikesThis 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

04:19
Can you solve the river crossing riddle?  Lisa Winer
Added 378 Views / 1 LikesView full lesson: http://ed.ted.com/lessons/canyousolvetherivercrossingriddlelisawiner As a wildfire rages through the grasslands, three lions and three wildebeest flee for their lives. To escape the inferno, they must cross over to the left bank
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03:48
Can You Solve This Harvard Admissions Question? Algebra Problem, 1869
Added 120 Views / 0 LikesThe 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

05:57
Can You Solve This 6th Grade Geometry Problem From Singapore? The Area Of A "Claw"
Added 171 Views / 0 LikesThis problem was given to Primary 6 (age 1112) 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

07:39
Can You Solve The Alien Extinction Riddle? Hard Job Interview Question
Added 123 Views / 0 LikesA 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

11:27
Can You Solve The Viral 11x11 = 4 Puzzle? The Correct Answer Explained
Added 163 Views / 1 LikesIf 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

04:53
Can you solve the prisoner boxes riddle?  Yossi Elran
Added 196 Views / 0 LikesView full lesson: http://ed.ted.com/lessons/canyousolvetheprisonerboxesriddleyossielran Your favorite band is great at playing music...but not so great at being organized. They keep misplacing their instruments on tour, and it’s driving their mana
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02:06
Can You Solve The Viral Matchstick Puzzle 6 + 4 = 4?
Added 174 Views / 0 LikesCan 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 7segment numbers (the block

03:04
Trick Question  Find the missing dollar
Added 96 Views / 1 LikesTrick question! Three friends are overcharged for their hotel room. The hotel decides to refund the difference. After the hotel issues the refund one dollar has mysteriously disappeared. Where is the missing dollar? Find the solution to this trick questio

02:21
Trick Question  Test your math skills
Added 78 Views / 0 LikesFind the maximum and minimum values of X in this trick question. Each value of X must satisfy the given inequality. Test your math skills and have fun with this trick question. My name is Chris and my passion is to teach math. Learning should never be a s

02:51
The Horse Horseshoe Boots Viral Algebra Problem  The Correct Answer Explained
Added 276 Views / 1 LikesA 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
Added 194 Views / 0 LikesWhat 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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07:25
Can You Solve The Race To December 31 Riddle?
Added 79 Views / 0 LikesHere'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

08:05
Can You Solve The Hardest Easy Geometry Problem?
Added 133 Views / 1 LikesIn 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

05:55
"Impossible" Logic Puzzle  How Many Liars Are At The Party?
Added 133 Views / 0 LikesA 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

05:08
Can you solve this pier puzzle?
Added 62 Views / 0 LikesThis math brainteaser challenges you to find a simple, elegant solution to a seemingly complex problem! Can you figure it out? There are two towns near a shore. They want to build a pier on the shoreline with a path connecting the pier to each town. They

06:01
Can You Solve The Viral 1 + 4 = 5 Puzzle? The Correct Answer Explained
Added 653 Views / 0 LikesThis 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

06:24
Can You Solve The Chameleon Riddle?
Added 129 Views / 0 LikesA 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

07:21
Can You Solve The Magical Pond Puzzle?
Added 108 Views / 1 Likes(Same video with music: https://youtu.be/nFGpk0ZpRk) You visit a shrine that has 3 temples. Before each temple, you have to swim in a magical pond. Your path is pondtemple1pondtemple2pondtemple 3. Each time you swim, the pond magically triples the n

05:26
Can You Solve The Red Ball Lottery Puzzle?
Added 70 Views / 0 Likes(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

04:08
Can You Solve The Passcode Riddle?  Ganesh Pai
Added 312 Views / 1 LikesView full lesson: http://ed.ted.com/lessons/canyousolvethepasscoderiddleganeshpai In a dystopian world, your resistance group is humanity’s last hope. Unfortunately, you’ve all been captured by the tyrannical rulers and brought to the ancient colis
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01:49
This Matchstick Puzzle Is
Added 116 Views / 1 LikesThis 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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07:10
TOUGH Interview Question  Ways To Give 11 Coins To 3 People
Added 73 Views / 0 LikesHow 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 nonnegat

06:57
When Is Christmas? Mentally Convert Date To Day Of The Week
Added 65 Views / 0 LikesJanuary 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/p6aMk4qQ Doomsday Rule (previous video): https://www.youtube.com/watch?v=UsStBxY9STw Calcu

04:22
Impossible Algebra Problem
Added 305 Views / 0 LikesThis 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/p6aMk4up If you like my videos, you can support me at Patreon: http://www.patreon.com/mindyourdecis

03:25
Can You Solve This? AA + BB + CC = ABC
Added 127 Views / 0 LikesIf 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/p6aMk4Cm If you like my videos, you can support me at Patreon: http://www.patreon.c

02:57
Viral Facebook Math Problem
Added 182 Views / 0 LikesThis 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

06:24
The Seemingly Impossible Escape Logic Puzzle
Added 170 Views / 0 LikesAn 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/cgibin/yabb/YaBB.cgi?board

01:18
Can You Make 4 Triangles From 6 Matches?
Added 106 Views / 0 LikesCan 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

07:52
Find The 10 Digit Number Classic Puzzle And Solution
Added 69 Views / 0 LikesI'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:

01:57
I Will Read Your Mind  Math Magic Trick
Added 222 Views / 0 LikesPick 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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03:33
Can You Solve This Intelligence Test? Viral Facebook Puzzle
Added 83 Views / 0 LikesIf 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

04:52
Can You Solve The Two Rope Puzzle?
Added 78 Views / 0 LikesYou 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

08:27
Can You Solve The 3 Cards Riddle?
Added 99 Views / 0 LikesThere 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

02:57
Can You Solve This Crazy Equation? Ramanujan's Radical Brain Teaser
Added 79 Views / 0 LikesIn 1911, Srinivasa Ramanujan posed this problem involving an infinite nested radical (a neverending 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

03:09
Can You Solve The Marriage Logic Problem? 80% Fail
Added 76 Views / 0 LikesSurveys 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

05:09
Can You Solve The Snake Eyes Probability Riddle?
Added 86 Views / 0 LikesYou 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

02:37
Adults Stumped By Maths Questions For 15 Year Olds. Can You Solve Them?
Added 90 Views / 0 LikesHow 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

04:13
Adults Stumped By Geometry Problems For 10 Year Olds. Can You Solve Them?
Added 99 Views / 0 LikesThese 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

03:28
Flower Math Problem  Adults Stumped By Question For Kids In China
Added 137 Views / 0 LikesThis 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

04:01
Can You Solve The Control Room Riddle?  Dennis Shasha
Added 266 Views / 0 LikesView full lesson: http://ed.ted.com/lessons/canyousolvethecontrolroomriddledennisshasha As your country's top spy, you must infiltrate the headquarters of the evil syndicate, find the secret control panel, and deactivate their death ray. But your
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05:05
Try This April Fools' Trick! (Mystery Math)
Added 192 Views / 0 LikesHere's a simple trick you can play on your friends!
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03:50
Can You Solve The Locker Riddle?  Lisa Winer
Added 385 Views / 0 LikesView full lesson: http://ed.ted.com/lessons/canyousolvethelockerriddlelisawiner Your rich, eccentric uncle just passed away, and you and your 99 nasty relatives have been invited to the reading of his will. He wanted to leave all of his money to yo
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02:24
Will A Cat Win A Race Against A Dog?
Added 174 Views / 1 LikesYou may have heard about the race between the tortoise and the hare, but have you heard about the race between the cat and the dog? SUBSCRIBE NOW http://www.youtube.com/subscription_center?add_user=CuriosityShow CONNECT WITH CURIOSITY Facebook ➤ http://ww

03:56
Mind Reading With Numbers
Added 170 Views / 0 LikesWhen someone is thinking of any number between 1 and 1000, Deane shows how to find that number with just 10 questions. It may seem like mind reading, but it is really logic. SUBSCRIBE NOW http://www.youtube.com/subscription_center?add_user=CuriosityShow C
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01:32
Restaurant Puzzle Strange Code
Added 62 Views / 0 LikesDeane and Rob decipher a coded message left in a restaurant. SUBSCRIBE NOW http://www.youtube.com/subscription_center?add_user=CuriosityShow CONNECT WITH CURIOSITY Facebook ➤ http://www.facebook.com/CuriosityShow Twitter ➤ https://twitter.com/CuriositySho

04:31
Can You Solve The Frog Riddle?  Derek Abbott
Added 323 Views / 0 LikesView full lesson: http://ed.ted.com/lessons/canyousolvethefrogriddlederekabbott You’re stranded in a rainforest, and you’ve eaten a poisonous mushroom. To save your life, you need an antidote excreted by a certain species of frog. Unfortunately, on
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04:13
Can You Solve The Temple Riddle?  Dennis E. Shasha
Added 254 Views / 1 LikesView full lesson: http://ed.ted.com/lessons/canyousolvethetempleriddledenniseshasha Your expedition finally stands at the heart of the ancient temple. But as you study the inscriptions in the darkness, two wisps of green smoke burst forth. The wal

03:10
Don't Checkmate  Brain Teaser
Added 98 Views / 0 LikesDon't checkmate the black king. In this brain teaser you must find one move for white which will not result in immediate checkmate for the black king. I also have a bunch of other fun brain teasers as well. My name is Chris and my passion is to teach math

02:04
Guess The Diagonal  Brain Teaser
Added 111 Views / 0 LikesTry to solve this brain teaser in less than a minute. You must guess the diagonal inside of the circle. There is enough information given which allows you to find the length of the diagonal in less than a minute. My name is Chris and my passion is to teac

04:09
Counterfeit Coins  Brain Teaser
Added 79 Views / 1 LikesFind the counterfeit coins in one of the eight bags! You may only use the weight scale once in this brain teaser. How do you know which bag has the counterfeit coins? I also have a bunch of other fun brain teasers as well. Heaven and hell  Brain Teaser h

01:51
Crossing The River  Brain Teaser
Added 159 Views / 0 LikesTry to solve this fun brain teaser. Cross the river with all of the zombies and humans. The boat can only fit two at a time. Also there can never be more zombies than humans. My name is Chris and my passion is to teach math. Learning should never be a str

06:35
Bisecting Yin And Yang  Brain Teaser
Added 103 Views / 0 LikesCan you bisect yin and yang using a straight line? Find the solution to this brain teaser in this video. I also have a bunch of other fun brain teasers as well. Heaven and hell  Brain Teaser https://www.youtube.com/watch?v=YOgKI0HWCnA Two burning ropes 

03:40
Two Burning Ropes  Brain Teaser
Added 110 Views / 0 LikesTwo burning ropes are needed to measure 45 minutes exactly. Each rope takes exactly one hour to burn, but they don't burn at a constant rate. Each rope is made of a different material and burns differently from the other. How do we measure 45 minutes exac

05:13
Can You Solve
Added 185 Views / 0 LikesView full lesson: http://ed.ted.com/lessons/canyousolveeinsteinsriddledanvandervieren View all the clues here: http://ed.ted.com/lessons/canyousolveeinsteinsriddledanvandervieren#digdeeper Before he turned physics upside down, a young Al

03:19
Heaven And Hell  Brain Teaser
Added 182 Views / 0 LikesFun brain teaser in which you have to choose between two doors. One of the doors leads to heaven and the other door leads to hell. You are allowed to ask the guards one question. What is one question that would guarantee certainty of choosing the door to

08:29
The Uncracked Problem With 33  Numberphile
Added 107 Views / 0 Likes33 is the lowest unsolved problem in the world of "summing three cubes". But 30 was also a tough nut to crack! Featuring Tim Browning from the University of Bristol. Taxi Cab Numbers: https://youtu.be/LzjaDKVC4iY Fermat's Last Theorem: https://youtu.be/qi

04:52
Can You Solve The Boat Puzzle?
Added 211 Views / 0 LikesYou throw a rock in water from your boat. Can you figure out what happens to the water level? physicsgirl.org instagram.com/thephysicsgirl facebook.com/thephysicsgirl twitter.com/thephysicsgirl Host/Writer/Editor: Dianna Cowern With help from: Jimmy Wong
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04:35
Can You Solve The Prisoner Hat Riddle?  Alex Gendler
Added 303 Views / 1 LikesView full lesson: http://ed.ted.com/lessons/canyousolvetheprisonerhatriddlealexgendler You and nine other individuals have been captured by superintelligent alien overlords. The aliens think humans look quite tasty, but their civilization forbids

03:35
Answering Question From Visual Inequality System
Added 73 Views / 0 LikesAnswering question from visual inequality system

03:50
Can You Solve The Bridge Riddle?  Alex Gendler
Added 400 Views / 1 LikesView full lesson: https://ed.ted.com/lessons/canyousolvethebridgeriddlealexgendler Taking that internship in a remote mountain lab might not have been the best idea. Pulling that lever with the skull symbol just to see what it did probably wasn’t s
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02:07
What Colour Is This Dress? (SOLVED With SCIENCE)
Added 121 Views / 0 LikesShare this video for the sake of the human race!! Get the AsapSCIENCE Book: http://asapscience.com/book Subscribe! bit.ly/asapsci Written by Mitchell Moffit and Greg Brown Instagram and Twitter: @whalewatchmeplz and @mitchellmoffit Clickable: http://bit.l

07:14
How To Win A Guessing Game  Numberphile
Added 249 Views / 0 LikesA clever use of random numbers to improve your odds in a number guessing game. Alex Bellos Books: http://bit.ly/BellosBooks Monty Hall problem: http://bit.ly/MontyHallProb NUMBERPHILE Website: http://www.numberphile.com/ Numberphile on Facebook: http://ww
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04:42
The Famously Difficult Greeneyed Logic Puzzle  Alex Gendler
Added 320 Views / 2 LikesView full lesson: http://ed.ted.com/lessons/thefamouslydifficultgreeneyedlogicpuzzlealexgendler One hundred greeneyed logicians have been imprisoned on an island by a mad dictator. Their only hope for freedom lies in the answer to one famously di

05:48
Winning At Rock Paper Scissors  Numberphile
Added 223 Views / 0 LikesSquarespace: http://www.squarespace.com/numberphile This video features Hannah Fry  https://twitter.com/fryrsquared More on this topic (and lizards): http://youtu.be/Z8lv2vy5vco And even more on this topic: http://youtu.be/ygHwBxWyI6E The paper: http://b
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03:15
Should You Catch A Tossed Coin?  Numberphile
Added 184 Views / 0 LikesRandomness expert (and former magician) Persi Diaconis on whether it is best to catch a coin or let it fall to the ground. Main video: http://youtu.be/AYnJv68T3MM Extra footage: http://youtu.be/9RKKoXw7wJw Superbowl coin tosses: http://youtu.be/bFfSfzjhfC
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11:34
That Viral Math Problem (Cheryl's Birthday)  Numberphile
Added 165 Views / 0 LikesSimon Pampena gives his take on THAT viral math problem from Singapore. EXTRA FOOTAGE for this video: http://youtu.be/MjYngjjpJg Simon on Twitter: https://twitter.com/mathemaniac NUMBERPHILE Website: http://www.numberphile.com/ Numberphile on Facebook: h

12:56
Monkeys And Coconuts  Numberphile
Added 165 Views / 0 LikesAn old problem which baffled many people. Featuring Dr Tony Padilla. Editing and animation in this film by Pete McPartlan  https://twitter.com/petemcpartlan NUMBERPHILE Website: http://www.numberphile.com/ Numberphile on Facebook: http://www.facebook.com

01:38
An Impossible Bet
Added 216 Views / 0 LikesShould you take the bet? Click here to find out: http://youtu.be/C5I0bAuEUE Thanks to my friend Dan Hoff for introducing me to this problem! MinutePhysics is on Google+  http://bit.ly/qzEwc6 And facebook  http://facebook.com/minutephysics And twitter 
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03:59
Solution To The Impossible Bet
Added 215 Views / 1 LikesThis problem is called the "100 Prisoners Problem", more info on the math here: http://en.m.wikipedia.org/wiki/100_prisoners_problem Thanks to http://www.ifixit.com for supporting us on Subbable! and to Subbable supporter @vicnice137 And thanks to my frie

12:16
3D Path Counting Brain Teaser
Added 139 Views / 0 LikesExtending the path counting to three dimensions More free lessons at: http://www.khanacademy.org/video?v=wRxzDOloS3o

10:42
Path Counting Brain Teaser
Added 144 Views / 0 LikesCounting paths in a square More free lessons at: http://www.khanacademy.org/video?v=9QduzzW10uA

11:19
Light Bulb Switching Brain Teaser
Added 159 Views / 0 LikesTurning light bulbs on and off. More free lessons at: http://www.khanacademy.org/video?v=WNhxkpmVQYw

12:09
Forehead Numbers Brain Teaser
Added 170 Views / 0 LikesThe perfect logicians are at it again. More free lessons at: http://www.khanacademy.org/video?v=jqpQPxWj8gE

11:01
Blue Forehead Room Solution
Added 181 Views / 0 LikesDo not watch before Blue Forehead Room. THIS IS THE SOLUTION! More free lessons at: http://www.khanacademy.org/video?v=xYkTJFbuM0

07:25
Brain Teaser: Blue Forehead Room
Added 174 Views / 0 LikesWhat happens when 100 perfect logicians have to figure out if they each have a blue forehead? More free lessons at: http://www.khanacademy.org/video?v=rBaCDC52NOY

16:59
Alien Abduction Brain Teaser
Added 181 Views / 0 LikesSaving Earth from becoming a mushroom farm. More free lessons at: http://www.khanacademy.org/video?v=K4pocYXOmTQ

11:13
Toggler Brain Teaser
Added 160 Views / 0 LikesSeparating the truthteller from the togglers! More free lessons at: http://www.khanacademy.org/video?v=l3OkPYhDi9w

06:50
Liar Truthteller Brain Teaser
Added 133 Views / 0 LikesHow to get correct advice when you can only ask one question from either a liar or a truthteller (when you don't know who is what) More free lessons at: http://www.khanacademy.org/video?v=69rDtSpshAw