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IQ has nothing to do with age. An average IQ is around 100, no matter what age a person is.

Q: What is the average IQ of an 18-year-old girl?

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The average IQ of anyone at any age is around 100.

The average IQ score for an 11 year old girl is approximately 104.

100 is the average IQ of anyone and it does not depend on age.

At any age, the average IQ is normalized to 100. Therefore, 128 is an above-average IQ for an individual of any age.

IQ is the same for any age so 100 is the average.

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By definition the average IQ is 100

100 is baseline average for IQ, age does not matter.

The average IQ of anyone at any age is around 100.

100

By definition, the average IQ is 100.

The average IQ score for an 11 year old girl is approximately 104.

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100 is the average IQ of anyone and it does not depend on age.

IQ has nothing to do with your age or gender. Your IQ would be the same no matter what age you were. And an average IQ is 100. So yours is slightly above average.

At any age, the average IQ is normalized to 100. Therefore, 128 is an above-average IQ for an individual of any age.

IQ is the same for any age so 100 is the average.

Yes, that is good for anyone and is above average. A person with an IQ between 90 and 110 is considered average.