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The IQ rating scale is built with a mathematical comparison of your mental age with your chronological age, and the result is multiplied by 100 for normalization. 70% of the population fall between 85 and 115. Only 0.5% have a score over 140.

IQ Ratings of Over 140 - Genius or near genius

IQ Ratings of 120 to 140 Highly intelligent

IQ Ratings of 110 to 119 Very intelligent

IQ Rating of 90 to 109 Normal or average intelligence

IQ Ratings of 80 to 89 Dullness

IQ Rating of 70-79 Borderline deficiency

IQ Ratings Under70 Definite feeble-mindedness

This is one of many processes for measuring IQ, first developed in 1916.

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