Lightning Calculation and Other "Mathemagic"
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.
Video: Ted & LiveLeak
Tags: Arthur Benjamin | Mathemagic | Mathemagician | Maths