Perplexing Paperclips - Numberphile
17:13
A Magic Square Breakthrough - Numberphile
16:26
Earthquakes, Circles and Spheres - Numberphile
58:28
Tadashi Tokieda - Magic with a ribbon, paperclips, rubber bands
24:52
What if all the world's biggest problems have the same solution?
16:07
Terrific Toothpick Patterns - Numberphile
18:48
How a Russian student invented a faster multiplication method
12:53
Strange Spinning Tubes - Numberphile
11:37