I took a IQ test for a 13 year old, being 13. I received a 125, I beleive that is a good score, but I'm not possitive.
Valid IQ tests are administered by psychologists who are trained to study you while you are taking the test, and part of your score is based not only on the answers you give but also on the time you take, the method you use to solve certain problems, the order in which you answer questions, etc. There is a lot of subjectivity in it.
With that being said, a score of 100 is generally considered "average." A score up around 150 is about the highest possible. So 125 is a very good score.
Online IQ tests are probably the most unreliable things ever. For one - they offer you a wide selection of answers, and most people don't look through them carefully. There is also the time involved to answer questions, how you find the answer, etc. Doing it online means you will cheat unintentionally or select random answers. See a psychologist who will most certainly help you find your IQ level.
There's no such thing as an IQ test for 13 year olds. There's the Wechsler Intelligence Scale for Children, which is for children between the ages of 6 and 16, and has to be administered by a psychologist. The test results you got from an online IQ test dont mean anything. And some how I doubt a psychologist gave you those results, or they'd have explained what they meant.
Let me clarify, there are no VALID IQ tests you can do online. Much less a short IQ test. I'm sorry, but those results dont mean anything.
on a much short iq test I also received an iq for that of 142. Also, I did find iq tests by grade level.