Fool your friends into thinking you're a math whiz! With this simple trick, you can add up 10 numbers in your head way faster than a calculator. COMMENT, FAVORITE and SHARE this video if you liked it! Subscribe for free! www.youtube.com/subscription_center?add_user=scamschool Scam School Homepage revision3.com/scamschool Twitter twitter.com/scamschool Facebook www.facebook.com/scamschool.tv Brian Brushwood on Twitter twitter.com/shwood ABOUT SCAM SCHOOL If Harvard offered a PhD in deceit, this would be it. Award-winning magician Brian Brushwood takes viewers on an inside tour of bar tricks, street cons, and scams. If you watch carefully, you'll never have to pay for a drink again!