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A more accurate representation is:

Genius 145 and above

Gifted 130 to 145

Smart 115 to 130

Normal 90 to 115

Below average 80 to 90

Slow 65 to 80

Retarded Under 65

Note that the average is based on ALL people. Many people with extremely low IQ's have other serious physical problems so they don't survive to grow up, thus MORE than half of all adults have an IQ over 100.

Other classifications include:

Terman's Stanford-Binet Fourth Revision classification (developed by the inventor of the IQ test)

IQ Range ("Deviation IQ")Intelligence Classification152 and overGenius and near genius148 - 151Very superior intelligence132 - 148Superior intelligence116 - 132Above average intelligence84 - 116Normal or average intelligence68 - 84Dullness52 - 68Borderline deficiencyBelow 52Mental Deficiency

and

Wechsler's classificationIQ Range ("Deviation IQ")Intelligence Classification>= 130Very superior120 - 130Superior110 - 120Bright normal90 - 110Normal80 - 90Dull normal70 - 79Borderline50-55 to ~70Mild Mental Retardation (MR)35-40 to 50-55Moderate MR20-25 to 35-40Severe MR<= 20-25Profound MR
By definition the average IQ score is supposed to be 100. However the scale is not that accurate as its developers would like it to be an so it varies over time.

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6y ago
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12y ago

The average IQ is 100.

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Q: What is the average IQ?
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