Question

Calculate IQ of a child with 12 years and 6 months, Mental age is 120. what is the chronological age?

Answer 1

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The IQ score was calculated by dividing the test taker's mental age by his or her chronological age and then multiplying this number by 100. 

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For example, a child with a mental age of 12 and a chronological age of 10 would have an IQ of 120 (12/10 x 100).