A seemingly simple math problem has gone viral this week, leaving people totally stumped on social media. The equation in questions is: 15 - 15 × 4 ÷ 2 = ? At first glance, it looks like a basic grade ...

I'm working on a challenge problem that was posted at school. I'm not looking for an answer, but rather a nudge in the right direction to be able to figure the problem out on my own.<BR><BR>The ...