Why 381,654,729 is awesome

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...

Discussing pandigital numbers with Dr James Grime (and a special guest).

With thanks to: http://www.squarespace.com

Check out Dr Grime at: http://singingbanana.com
And on Tumblr at: http://singingbanana.tumblr.com

And here is a hidden extra bit we cut from this video: http://youtu.be/8qGTuH1lrgc