Question: What is the mental age of a 12 year old?

What is the IQ of a 12 year old with a mental age of 15?

The Calculations The IQ of a 15-year-old with a mental age of 12 is (12/15) * 100 = 80. Therefore, two children with the same raw scores on an IQ test can have very different IQ scores if they are of different ages.

What is the IQ score of a 12 year old with a mental age of 12?

So, if a child is 12 years old and has the mental age of a 12 year old, 12 divided by 12 is 1.0, times 100 gives an IQ of 100. 100 is by definition an average IQ.

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