hello, smarty pants. perfect for everyone who knows they are smarter than you.

This brings a smile to my face everytime! You can tell the time, only if you solve the math equation!! What a great gift for that math geek you know and love! (via decor craft inc.)

Each hour is marked by a simple math problem. Solve it and solve the riddle of time. Or, you can just know that "52 - x2 + x = 10" happens to live in the "7 o'clock" position* and be done with it.

Just looking at this is going to give you a headache'

$29.95

The Pop Quiz clock measures 11.5" in diameter. Housed in a sturdy plastic frame and featuring chalk looking white formulas against a blackboard looking face. (via www.baronbob.com)

I would buy this for my artsy sister just because it would stress her out so much. But in a funny loving way, not in a mean evil way. Perhaps it would help all of us to stay a little more sharp while out of school.

You've never had to work this hard to tell the time. It's a clock with impossible (for me) math equations. However, a math dork would, inevitably, find this hilarious.

If you can solve the math problems on this clock, then you will have no problem figuring out what time it is. All that thinking would give me a migraine.

AWESOME clock. Ok, maybe I'm just a nerd and most people don't appreciate doing math to figure out the time - but in case you haven't learned how to tell time without a digital clock, then you have bigger problems.