The Three Square Geometry Problem

Alex Bellos discusses how the Incans used knots in string (Quipu) to record numbers.Check out Brilliant (get 20% off their premium service): https://brillian...

Three Square Geometry Problem

Featuring Professor Zvezdelina Stankova.

Extra footage1: http://youtu.be/TIwSsirIzuU
Extra footage 2: http://youtu.be/Be_sXh1KrRU
Pebbling a chess board: http://youtu.be/lFQGSGsXbXE

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