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 ...

Halfway through school vacation, kids who miss factoring polynomials are doing the next best thing: e-mailing each other math tricks. I got the latest one courtesy of Lauren, a soon-to-be ...