The Rubik's Cube is a Calculator
17:27
Modular Multiplication is just Modular Addition
29:42
Why 4d geometry makes me sad
12:29
Gaussian Primes Visually
13:35
How Many Ways Can You Fold a Map?
4:37
The secret to solving 3x3 rotationless
13:01
The Change from Roman Numerals - Numberphile
36:34
This puzzle took me three years and required thinking in 3721 dimensions
24:00