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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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14y ago
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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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