Stacked Dice Trick

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...

A third dice trick with Ben Sparks - see the trilogy of tricks at: https://bit.ly/Dice_Trilogy

Ben Sparks: https://www.bensparks.co.uk

And his YouTube: https://www.youtube.com/c/Sparks

Maths More Ben Sparks on Numberphile: http://bit.ly/Sparks_Playlist