I hate to sound like a cliche, but those out there who are concerned about their IQ scores should remember this:
Your IQ is a measure of how well you do on IQ tests. That's all. An assessment situation, even one extended over 2 days including neurological scans or whatever, will never be a true indicator of what 'intelligence' really means. To elaborate on what someone mentioned above, the only way to know if you are intelligent is to have someone you consider intelligent, and who knows you well, tell you so. It's really too bad that entrance to, for instance, gifted programs, are barred to people who 'fail' IQ tests; it would be much more useful to have, say, teachers' recommendations for such purposes. But that would be far less 'efficient'--not to mention potentially open to abuse. Nevertheless, in the real world, that's exactly what happens; no one gives a rat's anus about your IQ--they want personal references instead.
And, by the way, CurtSibling's on to something in his comment about spelling; in my opinion, linguistic competence
is intelligence. Your IQ score is just a number--you will lose lots of friends if you constantly attempt to remind them that yours is higher than theirs. On the other hand, being a good and confident communicator of your ideas will cause others to be impressed by your intelligence all on their own.
So, whatever your IQ is, read lots of intellectually-stimulating stuff,
do worry about your spelling and grammar (because, in the end, that's one of the few 'windows' into your mind others have), maybe join the debating team at your school, and you'll do just fine. Nothing beats having people say, unprompted by any deliberately leading action of your own, "Wow, you're really smart, you know that?"
(Whoa, did I just sound like my grade 8 English teacher or what?

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