A child of 16 years scores 75 in an IQ test his mental age will be ………… years.

Options

A. 12
B. 8
C. 14
D. 15

Answer

A

Explanation

IQ stands for intelligence quotient Supposedly, it is a score that tells one ‘bright’ a person is compared to another person on the basis of IQ. The average IQ is by definition 100,” scores above 100 indicate a higher than average and scores below 100 indicate a lower than average.
Hence IQ = mental age divided by chronological age and multiplied by 100
75=(mental age/chronological age)*100
75=(mental age*100)/16
or mental age=12 years