There are lots of unsolved mysteries in the world of math, and many of them start off with a deceptively simple premise, like: What's the biggest couch you can slide around a 90-degree corner? Hosted ...

Elon Musk solved an “unsolvable” math problem after a Harvard professor called him “rich but dumb.” A Harvard Professor Mocked Elon Musk as 'Rich But Dumb'—Then Musk Solved an 'Unsolveable' Math ...