http://www.testcafe.com/iqtest/
(I don't recommend spending money to buy your full results, the test probably isn't all that accurate or reliable anyway. Just a fun brain teaser.)

Gee, I wish someone would tell my professors this!
Also, I just found this interesting list, I'm not sure if it uses the same scoring system or what have you, as I know very little about IQ tests, but it's interesting to compare different historical figures:
http://www.archure.net/psychology/IQs.html
