First off I would like to say that this item is better than I thought it was going to be. Not only do they give an IQ testing exam but they help you solve the questions you answered wrongly. It would be nice if they would give explanations on all the 40 questions but maybe in the next version. Another pretty nice feature is the ability to have different users. I guess I should mention one other feature which is the sounds option. I choose to use no sounds just because they bother me when i'm taking the test. You would here sounds such as airplanes flying by or strange beeps whenever you choose the answer to your question. Its up to you whether you want the sounds on or off.