Rotation without rotating.
26:51
New divisibility rule! (30,000 of them)
28:47
Someone improved my code by 40,832,277,770%
18:14
Could you pass this interview? The famous batteries and flashlight logic puzzle
21:19
What are these symbols? - Numberphile
30:15
The Bingo Paradox: 3× more likely to win
28:37
How does Dobble (Spot It) work?
29:42
Why 4d geometry makes me sad
24:00