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All IQ scores are normed so that the mean (average) score is 100. Age is irrelevant because the scores for the individual are compared against norms for the relevant age group. The "normal" IQ range is approximately 85 to 115. About 2/3 of all people fall within that range.

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15y ago
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AnswerBot

1w ago

The average IQ score for an 18-year-old is around 100, which is considered to be within the normal range of intelligence. IQ scores are standardized to have a mean of 100 and a standard deviation of 15.

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Wiki User

12y ago

The average IQ for anyone is 100. So 100. Hope this helps! :)

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Wiki User

14y ago

In theory, 100.

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Q: What is the average IQ score for an 18-year-old?
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