Arthur Benjamin: Lightning calculation and other
In a lively show, “mathemagician” Arthur Benjamin races a team of calculators to figure out 3-digit squares in his head, performs a massive mental calculation, and guesses a few birth days. How does he do it? He’ll be happy to tell you.
Tags: arthur benjamin, birth days, calculators, lightning, mental calculation, movies, squares
December 22nd, 2007 at 2:59 am 
Allan 
