This website from cool quiz is a great site to try out to test your inner geek. The site asks you a series of questions, some info about you and then it gives you your "geek quotient". The test varies each time you visit the site, so if you click on the option to re-take the test, you'll get a series of new questions with MAYBE a repeat or two.
Now, if your inner geek just doesn't exist, there are several other quizzes (including "life/style" quizzes) you can take like a crush test to see if you and your significant other make a cute couple, a friend test to see how good of a friend you are to somebody, or an IQ test to see if you're paying attention to the questions!! This site also is a source of jokes and funnies to send to friends if they want them, or puzzles to get your mind moving or let it rest.