It’s 9 a.m. on a Tuesday morning. Or maybe it’s 10 a.m. on a Wednesday. Or maybe your team meets on Thursdays around 11 a.m. It’s that time of week where a group of smart go-getters sit down for their ...

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, ...