A grade-school math problem has left people perplexed, can you solve the simple-looking equation in just 30 seconds? The sum, posted to X by BreakTheSilos, that regularly shares brainteasers, is: 12 - ...

Math equations used to be a daily chore for many elementary schoolers. But entering adulthood means those less mathematically inclined often never have to think about them ever again. And it appears ...