I don’t typically write responses to other opinion pieces, but there was one two weeks ago about new techniques in elementary math education that has inspired me. The main complaint was that there are ...

Numberphile revived an ancient multiplication trick—halves and doubles—also called Egyptian or Russian math, where you repeatedly halve one number and double the other. After crossing out rows with ...

If you’re not sure how to wrap a present, there’s an easy hack you can try. The clever trick—wrap diagonally, not horizontally or vertically—is based in math. Basic geometric principles explain how it ...