I take free mensa prep tests I've done well on some, and not so well on others lol. If you want an official mensa practice test they're ten dollars. The tests are mostly logical with a little math thrown in. I also took a national mensa test they televised a few years ago. I scored high on all the school tests they gave us as kids except in math, that's always been my weak point. I did really well on the military asvab test when I've taken it as well...there were some jobs that I wanted that required it. I don't remember my scores.

Really it's not about the numbers but how you apply what you learn.