Magic Square Party Trick
Matt Parker shows off his Magic Square party trick (unlike magicians, mathematicians often reveal their secrets).
More Magic Square videos: http://bit.ly/MagicSquareVideos
Rubik's Cube videos: http://bit.ly/rubiksvids
More Matt on Numberphile: http://bit.ly/Matt_Videos
A little extra bit for this video: https://youtu.be/zhB2AUNcsx0
Parker Square: https://youtu.be/aOT_bG-vWyg
Parker Square T-Shirt: http://bit.ly/ParkerSquareTshirt
