I have tested my IQ 2 times online and both times it was less than 100. Last time it was 91. According to information found on the internet, I could not even graduate a high school. But I somehow managed to graduate a university in applied mathematics, though I haven't received top scores. Maybe those tests are a bit synthetic and depend on education system, so people graduated different education system have different thinking mechanism? In my country we never solved logical tasks like those in the IQ tests (a few similar pictures and alike) maybe I simply don't know how to solve them? In our country it's known that american high school level is much lower than in eastern european countries, but universities are much stronger in this point of view.
(I'm sorry for my broken English)