@jerry The "math problems" I've seen are mostly about operator priority, like 2 + 2 x 2, is that 6 or 8? Yes, it's good to know about these things, but mathematically, it's just a convention and therefore boring. I mean it's not as if they were arguing about Russell's paradox or anything.

I think these "problems" are created as attention-getters because the people who pose them know that at least someone will get them wrong and before you know it, people will be called idiots.