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, ...

The question goes: "A bat and a ball cost $1.10 in total. The bat costs $1.00 more than the ball. How much does the ball cost?" Is your knee-jerk response that the ball costs 10 cents? That is a ...

Get your timer out and see whether you can remember the golden rule from grade school math class.

Add Yahoo as a preferred source to see more of our stories on Google. The bat-and-ball problem is famous for eliciting the wrong answer, even from brilliant people. There’s a blindingly simple math ...