Here at PopMech, we love mind-bending math and logic puzzles, which is why we regularly recruit the sharpest minds in the world to concoct riddles that will test your critical thinking, mathematics, ...

888 + 88 + 8 + 8 + 8 = 1,000. This is the kind of math riddle you can work out with times tables, or by simple logic. First, get as close to 1,000 as you can (888). From there, it’s easy to figure out ...

An airplane is flying in a straight line toward its landing strip when the pilot realizes their altimeter isn’t working. The pilot looks ahead and down, and sees the edge of the airfield at an angle ...

If you've got the time, we've got the riddle. And it's time for a riddle about time: How many numbers are on a clock?

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Hungry for Pi? Check out NASA's Pi Day challenge and put your wits to the test solving problems just like NASA scientists and engineers. When you purchase through links on our site, we may earn an ...