The Insane World of Polygon Packings
16:15
How to Prove a Number is Irrational
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Why 666 Isn't Cursed, But 6[6]6 Might Be
23:44
Multiplication Tables Are Taught Wrong
20:56
Equations That Are True in Many Bases
19:18
The Bubble Sort Curve
5:25
4 Views of the 4-Cube
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A Problem with Rectangles - Numberphile
13:08