21-card trick – Numberphile
A simple trick with some neat math behind it. More on Numberphile cards at: http://www.bradyharanblog.com/numberphile-playing-cards More links & stuff in full description below ↓↓↓ More cards video: http://bit.ly/Cards_Shuffling This video features Anatstasia Chavez: http://anastasiachavez.academia.edu/cv We did a similar video to…
