"Scary" homework problem is impossibly hard
![](https://i.ytimg.com/vi/stpiBy6gWOA/mqdefault.jpg)
17:13
A Magic Square Breakthrough - Numberphile
![](https://i.ytimg.com/vi/cm5BYkMlFXY/mqdefault.jpg)
13:46
Can you solve Microsoft's bridge and torch riddle?
![](https://i.ytimg.com/vi/1HU71oTH3HM/mqdefault.jpg)
14:29
How Wrong Can a Calculator Be?
![](https://i.ytimg.com/vi/1vJsWKg2o1w/mqdefault.jpg)
25:05
Ranking Paradoxes, From Least to Most Paradoxical
![](https://i.ytimg.com/vi/UdMm7kBbf8E/mqdefault.jpg)
4:55
Impossible puzzle game with solutions
![](https://i.ytimg.com/vi/1_JbJTeLZJs/mqdefault.jpg)
32:22
Simulating the Evolution of Aging
![](https://i.ytimg.com/vi/S6dlqrzhFbg/mqdefault.jpg)
12:40
3 outside the box problems from China
![](https://i.ytimg.com/vi/PQXR9mH5KYk/mqdefault.jpg)
34:03