The Change from Roman Numerals - Numberphile
14:04
The Big X and Multiplication - Numberphile
15:39
An amazing thing about 276 - Numberphile
14:29
New Recipe for Pi - Numberphile
25:05
Ranking Paradoxes, From Least to Most Paradoxical
26:19
Perfect Shapes in Higher Dimensions - Numberphile
18:31
The Light Switch Problem - Numberphile
19:05
Absolute Infinity - Numberphile
20:18