I know mine. I've taken two IQ tests and they came out within one point of each other. I like to go with the higher one!
I found out something interesting when my son, who has Asperger's, was tested in high school. The psychologist had to time his answers on each question. There were times when he got the correct answer to the question, but not within the time limit. Consequently, he couldn't get credit for those questions. The psychologist gave us the score, but said it was not an adequate measure of his intelligence. The test does not account for processing delays, which are common in people with autism and other conditions. Their brains can do the work, just not as fast. So, we really don't know his true IQ. We do know that he's extremely intelligent though! The school psychologist was working on his Ph.D. I suggested that his dissertation topic should be to develop IQ test guidelines for people with processing delays.