Start with a deck of cards. Before the trick, sneak a peek at the 10th card in the deck. Memorize it. Ask your volunteer to add the first and second digit of their number together. For instance, if he ...

YouTuber Kevin Lieber (who hosts the popular Vsauce2 series) has brought a classic math magic trick back from its ‘90s heyday. In the video, Lieber walks viewers through a magic trick where they ...

Everyone gets really wow'd when someone pulls off some exceptional mental math. The best part is, you can totally be that guy at the party with a little practice and preparation. What follows is 10 ...

Flipping through a deck of cards in the library as her friends and classmates slough through books and papers means that, sometimes, people want answers from Carolyn Chen. "I usually have to reassure ...