Number Sticks

Additional information

Have a look at Brilliant (and get 20% off) here: https://brilliant.org/Numberphile (sponsor)

More Katie on Numberphile: http://bit.ly/Steckles_Playlist

Katie Steckles: http://www.katiesteckles.co.uk/

Those mental log sticks on Amazon: http://amzn.to/2ItpMYQ (affiliate link)