Here’s how the Rule of 72 works: Divide 72 by your expected annual interest rate (as a percentage, not a decimal). The answer is roughly the number of years it will take for your money to double. For ...

Body mass index, or BMI for short, is a measure of body weight based on your height. For decades, BMI has been a way to measure whether someone is at a healthy weight. In general, people are ...

In January I wrote a piece titled “ 5 Physics Equations Everyone Should Know .” Lots of you weighed in with your own ...

Even if you’re a Strava refuser or a smartwatch shunner, the purest of purist runners invariably have an ideal finish time in their heads when they arrive at a start line. If you’re going to hit or go ...

The viral math problem has X users stumped - but the answer comes from lessons learned in fifth or sixth grade. The best way ...