Math in Real Life

Why don't perpetual motion machines ever work? - Netta Schramm.
Where do math symbols come from? - John David Walters.
What's the fastest way to alphabetize your bookshelf? - Chand John.
Why do airlines sell too many tickets? - Nina Klietsch.
What's the difference between accuracy and precision? - Matt Anticole.
How high can you count on your fingers? (Spoiler: much higher than 10) - James Tanton.
The unexpected math behind Van Gogh's "Starry Night" - Natalya St. Clair.
The Infinite Hotel Paradox - Jeff Dekofsky.
Can you solve the bridge riddle? - Alex Gendler.
Can you solve the prisoner hat riddle? - Alex Gendler.
Can you solve "Einstein’s Riddle"? - Dan Van der Vieren.
Can you solve the temple riddle? - Dennis E. Shasha.
Can you solve the three gods riddle? - Alex Gendler.
Can you solve the locker riddle? - Lisa Winer.
Can you solve the passcode riddle? - Ganesh Pai.
Can you solve the prisoner boxes riddle? - Yossi Elran.
Can you solve the frog riddle? - Derek Abbott.
Can you solve the counterfeit coin riddle? - Jennifer Lu.
Can you solve the control room riddle? - Dennis Shasha.
Can you solve the virus riddle? - Lisa Winer.
Can you solve the airplane riddle? - Judd A. Schorr.
Why do competitors open their stores next to one another? - Jac de Haan.
Can you solve the river crossing riddle? - Lisa Winer.
Can you solve the pirate riddle? - Alex Gendler.
Exponential Growth: How Folding Paper Can Get You to the Moon.
Can you solve the fish riddle? - Steve Wyborney.
Can you solve the egg drop riddle? - Yossi Elran.
Exploring other dimensions - Alex Rosenthal and George Zaidan.
Why do honeybees love hexagons? - Zack Patterson and Andy Peterson.
What is Zeno's Dichotomy Paradox? - Colm Kelleher.
The mathematical secrets of Pascal’s triangle - Wajdi Mohamed Ratemi.
Is math discovered or invented? - Jeff Dekofsky.
Can you solve the dark coin riddle? - Lisa Winer.
Group theory 101: How to play a Rubik’s Cube like a piano - Michael Staff.
How to defeat a dragon with math - Garth Sundem.
Check your intuition: The birthday problem - David Knuffke.
One is one ... or is it?.
The last banana: A thought experiment in probability - Leonardo Barichello.
How many ways can you arrange a deck of cards? - Yannay Khaikin.
Inside OKCupid: The math of online dating - Christian Rudder.
What's an algorithm? - David J. Malan.
Can you solve the seven planets riddle? - Edwin F. Meyer.
A brief history of banned numbers - Alessandra King.
The math behind Michael Jordan’s legendary hang time - Andy Peterson and Zack Patterson.
The origin of countless conspiracy theories - PatrickJMT.
How many ways are there to prove the Pythagorean theorem? - Betty Fei.
The infinite life of pi - Reynaldo Lopes.
How to spot a misleading graph - Lea Gaslowitz.
A clever way to estimate enormous numbers - Michael Mitchell.
Why do people get so anxious about math? - Orly Rubinsten.
The case of the missing fractals - Alex Rosenthal and George Zaidan.
What happens if you guess - Leigh Nataro.
Making sense of irrational numbers - Ganesh Pai.
How the Königsberg bridge problem changed mathematics - Dan Van der Vieren.
Pizza physics (New York-style) - Colm Kelleher.
The beauty of data visualization - David McCandless.
Did Shakespeare write his plays? - Natalya St. Clair and Aaron Williams.
The mathematics of sidewalk illusions - Fumiko Futamura.
Why are manhole covers round? - Marc Chamberland.
Can you find the next number in this sequence? - Alex Gendler.
What is a vector? - David Huynh.
A brief history of numerical systems - Alessandra King.
The coin flip conundrum - Po-Shen Loh.
The mighty mathematics of the lever - Andy Peterson and Zack Patterson.
What in the world is topological quantum matter? - Fan Zhang.
An introduction to mathematical theorems - Scott Kennedy.
How algorithms shape our world - Kevin Slavin.
How to visualize one part per million - Kim Preshoff + The TED-Ed Community.
How does math guide our ships at sea? - George Christoph.
How to organize, add and multiply matrices - Bill Shillito.
The time value of money - German Nande.
A trip through space to calculate distance - Heather Tunnell.
Euclid's puzzling parallel postulate - Jeff Dekofsky.
Math class needs a makeover - Dan Meyer.
Gridiron physics: Scalars and vectors - Michelle Buchanan.
Why can't you divide by zero? - TED-Ed.
The beautiful math of coral - Margaret Wertheim.
Fractals and the art of roughness - Benoit Mandelbrot.
Symmetry, reality's riddle - Marcus du Sautoy.
Building unimaginable shapes - Michael Hansmeyer.
Can you solve the Mondrian squares riddle? - Gordon Hamilton.
How exactly does binary code work? - José Américo N L F de Freitas.
Can you solve the Leonardo da Vinci riddle? - Tanya Khovanova.
The greatest mathematician that never lived - Pratik Aghor.
The satisfying math of folding origami - Evan Zodl.
The paradox at the heart of mathematics: Gödel's Incompleteness Theorem - Marcus du Sautoy.
The method that can "prove" almost anything - James A. Smith.