Everyone agreed on the first step: Solve inside the parentheses, for 2+2=4. But after that, people split down two paths. Some multiplied first, while others divided, leading to different answers—1 and ...

Every few months, the Internet eats itself over some kind of viral riddle or illusion, each more infuriating than the last. And so, like clockwork, this maddening math problem has gone viral, ...

Every now and again, homework takes social media by storm. Sometimes it’s a young child’s vexing assignment, or a classic brain teaser. But the problem above that’s stirred such debate is really just ...