The issue: Many runners (particularly women) report that their fitness trackers tell them they’re exercising in a higher zone ...

Try this ancient multiplication trick—halves and doubles, also called Egyptian or Russian math—where you repeatedly halve one ...

The problem is not a lack of talent in the world. It is a lack of innovation in our hiring. A borderless model solves this.

A version of this puzzle originally appeared in the October 1960 issue of Scientific American. What’s the Most Distant Galaxy ...

Financial planners recommend saving around 75% of your pre-retirement income for retirement. Using the 4% rule, you can ...

Educators and administrators in recent years have been eager to reimagine math instruction. Troubled by high failure rates in ...

Mathematics education must move beyond marks and memorisation, focusing instead on reasoning, problem-solving, and creative ...

Dear style & substance, I have never shown much emotion. Recently, I was asked by a friend if I even cared about a tragic situation because I wasn’t saying much. I care deeply. I just don’t talk about ...

Freida McFadden doesn’t write books so much as release them, rapid-fire. Since 2013, she has published thirty-two highly ...

A group of middle school girls is puzzling over a pie chart about reading habits in the U.S. Their “math designer” stands at ...

Total Addressable Market (TAM) is the north star metric investors inspect before opening their wallets and founders glance at ...