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This is Numberphile. We mainly post videos about mathematics and just numbers in general.

A Strange Change of Rotation

A Strange Change of Rotation

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...

Rotating cedar balls.

Here's a playlist of Tadashi Tokieda videos: http://bit.ly/tadashi_vids

Electric slide rule: https://youtu.be/MEyIppEOQTw

The Legend of Question Six

The Legend of Question Six

UNCRACKABLE? The Collatz Conjecture

UNCRACKABLE? The Collatz Conjecture