How To Square Any Number In Less Than A Second — Without A Calculator

Introducing your newest party trick.

Want to look a lot smarter than you actually are? "Mathemagician" Arthur Benjamin is here to help. Benjamin dropped by HuffPost Live on Wednesday and gave host Caroline Modarressy-Tehrani a peek at some of the incredible tricks in his book, The Magic of Math. In the video above, watch as he explains how to calculate the square of a three-digit number faster than it would take the rest of us to grab a calculator.

Watch the full HuffPost Live conversation with math whiz Arthur Benjamin here.

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