I found a humorous quiz on Kevin’s blog:
The question on how many planets are in the solar system threw me for a bit–not because I’m stupid, but because there is some ongoing discussion as to what constitutes a planet. I thought the quiz authors were trying to be tricky, but it turns out that they are merely looking for the customary answer, i.e. consider Pluto one of the planets and ignore 2003 UB313.
I guess “3% stupid” isn’t too bad, but I prefer the nerd test over this stupidity test.