Well, the IQ tests depend on two main things: time and answers. If you just guessed answers, you may have a good time, but you'd still fail because the answers would have too many errors. The answers give a big penalty, because they expect you to be able to answer all the questions correctly (in optimal conditions). Basically, its a balance of correct answers and fast time. Of course, IQ tests are not tests of knowledge, so do *not* depend on them to guess how smart people are. In fact, they would be useless for that. I know some people who had decent IQ test scores, but throw them a history test and they'll hit rock bottom. Likewise, there are people who are know almost everything, yet cannot score well on the IQ test. Don't sweat how you do here. And of course, remember this is a free test, and probably not the most accurate.