If you love math then the Pop Quiz Watch will be a dream come true for you. The rest of us will be doomed to scratching our heads in frustration over this watch that uses math problems to tell the time.
Some of the math problems on the Pop Quiz Watch are simple and easy to solve. Unfortunately a lot of them aren't, which could lead to some frustration if you're trying to tell and don't have time to work a math problem. Check out the watch in the gallery above.