Poetry Foundation
Rachel Wiley reads "The Mother Riddle"
Rachel Wiley (she/her/hers) reads her poem, “The Mother Riddle
TED-Ed
TED-Ed: Can you solve the multiverse rescue mission riddle? - Daniel Finkel
A bug in the superconductor system has trapped your team in 11 separate dimensions. Can you get them back home safely? -- It was a normal Tuesday at the superconductor, until a bug in the system caused your team to be trapped in 11...
TED-Ed
TED-Ed: Dennis Shasha: Can you solve the stolen rubies riddle?
Townspeople are demanding that a corrupt merchant's collection of 30 rubies be confiscated to reimburse the victims of his schemes. The king announces that the fine will be determined through a game of wits between the merchant and the...
TED-Ed
TED-Ed: Daniel Finkel: Can you solve the alien probe riddle?
Your team has developed a probe to study an alien monolith. It needs protective coatings — in red, purple and green — to cope with the environments it passes through. Can you figure out how to apply the colors so the probe survives the...
TED-Ed
TED-Ed: Can you solve the airplane riddle? - Judd A. Schorr
Professor Fukan_, 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 not enough fuel to complete the journey. Luckily, there are two other...
Curated Video
Can You Solve It? Avoiding The Troll Probability Riddle
Every day you walk from A to B. But your journey is unpredictable: randomly on half of the days, a troll blocks your path and forces you to walk around an invisible barrier. What is your best strategy to walk the least distance on...
Curated Video
Which Is Faster: Run Half The Distance Or Half The Time?
Thanks to Muztoba Ali in Bangladesh for this problem! Two brothers, A and B, have the exact same walking speed and the exact same running speed. One day they started the same trip to the same place. Brother A walked for half of the...
Curated Video
The Magical Fraction 1/999,999,999,999,999,999,999,998,999,999,999,999,999,999,999,999
The number 1/999,999,999,999,999,999,999,998,999,999,999,999,999,999,999,999 has the Fibonacci numbers in order for every group of 24 decimals. This video explains why the pattern emerges. (sources, proofs, and links below) Via Futility...
Curated Video
Can You Solve This Infinite Fraction?
What is the value of x= 1/(1 + 1/(1 + 1/(1 + ...)))? This continued infinite fraction has an interesting value! If you like my videos, you can support me at Patreon: http://www.patreon.com/mindyourdecisions Connect on social media. I...
Curated Video
MATHS PROBLEM STUMPING EVERYONE! Fraction Of Square Shaded
Mathematician Ed Southall, from the University of Huddersfield, created a stir when he tweeted this problem (@solvemymaths). The problem was covered in "The Daily Mail" and "The Sun." In this video I present one way to solve it. My blog...
Curated Video
Proving e = 2.718... Is An Irrational Number (3 Methods)
A rational number can be written as a ratio of two integers a/b. An irrational number cannot be written as such a ratio. Euler's number, e = 2.718.., is an irrational number. This video illustrates 3 methods to prove e is an irrational...
Curated Video
What Is The Factorial Of 1/2? SURPRISING (1/2)! = (√π)/2
Type 0.5! in your calculator to see what the factorial of one-half is. The result will be 0.886..., and the exact answer is the square root of pi divided by 2--amazing! How is this possible, when the factorial of a number n is defined as...
Grammaropolis
Welcome to Grammaropolis!
Classroom accounts available at https://edu.grammaropolis.com! Songs, books, games, quizzes, and individual student tracking. Song composed & performed by Doctor Noize (doctornoize.com) with lyrics by Doctor Noize & the Mayor of...
Curated Video
Solve If You Are A Genius (From 1869). Harvard Admissions Question Algebra Problem
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...
Curated Video
How Crossed Ladders And Working Together Problems Are Related - The Harmonic Mean
Problem 1: Two ladders are criss-crossed against walls of height 3 and 5. At what height do they intersect? Problem 2: I take 3 hours to complete a job, and you take 5 hours to do the same job. How long does it take if we work together?...
Curated Video
Why You Can Square In Your Head: The Numbers 34, 334, 3334, etc. and 67, 667, 6667, etc.
The 1985 session with Donald Knuth (see "monotonic squares") http://www-cs-faculty.stanford.edu/~uno/papers/cs1055.pdf Described in Aha! Solutions by Martin Erickson. http://www.maa.org/press/ebooks/aha-solutions Small correction: from...
Curated Video
Dark Knight Game Theory (Part 2): Joker Mob Negotiation
The Joker asks the mob for half the money. Why is this a reasonable amount? I've explained the scene in more detail here:...
AllTime 10s
10 Puzzles That Cant Be Solved
Have an IQ of 160+? Fancy yourself as the next Albert Einstein? Well good for you, but you probably still won't be able to solve these puzzles!
Curated Video
Maths Puzzles and Solutions Part 2
This video provides a range of maths puzzles and explains the solutions to each puzzle. A great activity for a lesson starter or brainteaser.
Curated Video
Maths Puzzles: Part 6
Maths Puzzles Part 6: Put your math skills to the test with these four fun and challenging puzzles! Perfect for all ages, these problems will help you think critically and improve your problem-solving abilities. Can you solve them all?...
Crash Course
Meiosis: Where the Sex Starts
The narrator of a short video walk scholars through the beginning steps of meiosis, details how the steps are similar to the stages in mitosis, and then points out the very specific differences in meiosis that for variation...