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For people who keep debating what the "Average" IQ is;
Your IQ is based on your age chronologically, and what knowledge you're supposed to have, compared to your intellectual age, how much knowledge you actually have.
Lets say you're 5 years old, and you're completely, in every explainable way "intellectually average". Then your IQ is 100. For every age, this is how an IQ of 100 works. The average. Now lets say you're 5, but as smart as a 7 year old. Take 7, divide by 5. You get 1.4, multiply that by 100. An IQ of 140.
It's because of this reason that IQ scores are highly over-exaggerated when you're young, and highly misleading when you're old, since you do stop learning at some point, in theory. A 45 year old and 55 year old are probably about as smart as one another, one just has 10 more years of expereince with life under his belt.