Why do airlines sell too many tickets?
Adults Math
Have you ever sat in a doctor's office for hours, despite having an appointment?
Can you solve the counterfeit coin riddle?
Adults Math
You're the realm's greatest mathematician, but ever since you criticized the Emperor's tax laws, you've been locked in the dungeon.
Should You Trust Your Gut Instinct?
Adults Math
Can you trust your gut feelings?
Rubik's Cube World Record
Adults Math
20 year old Mats Valk from the Netherlands has set a new record for completing Rubik's Cube.
The Pizza Equation
Adults Math
Get the most out of pizza with some simple math!
Can you solve the passcode riddle? - Ganesh Pai
Adults Math
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 coliseum for their deadly entertainment.
The origin of countless conspiracy theories
Adults Math
Why can we find geometric shapes in the night sky? How can we know that at least two people in London have exactly the same number of hairs on their head?
This Number is Illegal
Adults Math
85650789657397829 + 1402 more digits is an illegal number. To understand why this is, we need to learn a little bit of cryptology, a little bit of math, and a little bit of programming.
What is Random?
Adults Math
Is the future of the universe already determined?
How To Count Past Infinity
Adults Math
I'm very grateful to mathematician Hugh Woodin, Professor of Philosophy and Mathematics at Harvard, for taking the time on multiple occasions to discuss this topic with me and help me wrap my (finite) head around it.
Can you solve the locker riddle? - Lisa Winer
Adults Math
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 you, but he knew that if he did, your relatives would pester you forever. Can you solve the riddle he left for you and get the inheritance? Lisa Winer shows how.
Can you solve the frog riddle?
Adults Math
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.
Random couscous snaps into beautiful patterns
Adults Math
What is this? Some kind of witchcraft?!
Forget what you know | Jacob Barnett
Adults Math
Jacob Barnett is an American mathematician and child prodigy. At 8 years old, Jacob began sneaking into the back of college lectures at IUPUI.
Can you solve "Einstein's Riddle"? - Dan Van der Vieren
Adults Math
Before he turned physics upside down, a young Albert Einstein supposedly showed off his genius by devising a complex riddle involving a stolen exotic fish and a long list of suspects. Can you resist tackling a brain teaser written by one of the smartest people in history? Dan Van der Vieren shows how.
Can you solve the prisoner hat riddle?
Adults Math
You and nine other individuals have been captured by super-intelligent alien overlords. The aliens think humans look quite tasty, but their civilization forbids eating highly logical and cooperative beings. Unfortunately, they're not sure whether you qualify, so they decide to give you all a test. Can you solve this hat riddle? Alex Gendler shows how.
The Zipf Mystery
Adults Math
The of and to. A in is I. That it, for you, was with on. As have ... but be they.
The Banach-Tarski Paradox
Adults Math
Holy moly I'm gonna tear my $100 bill into five and rearrange it and boom! I have $200.
The Infinite Hotel Paradox
Adults Math
The Infinite Hotel, a thought experiment created by German mathematician David Hilbert, is a hotel with an infinite number of rooms. Easy to comprehend, right? Wrong. What if it's completely booked but one person wants to check in? What about 40? Or an infinitely full bus of people? Jeff Dekofsky solves these heady lodging issues using Hilbert's paradox.
How folding paper can get you to the moon - Adrian Paenza
Adults Math
Can folding a piece of paper 45 times get you to the moon? By seeing what happens when folding just one piece of paper, we see the unbelievable potential of exponential growth. This lesson will leave you wanting to grab a piece of paper to see how many times you can fold it!