A 10-year-old child with a mental age of ten would have an IQ of
A) 50.
B) 100.
C) 110.
D) 120.

Question

Quizplus · Accepted Answer

The concept of mental age is used in a formula to calculate IQ. IQ is calculated by dividing mental age by chronological age, and then multiplying by 100. In this case, a 10-year-old child with a mental age of ten (the same as their chronological age) would have an IQ of 100, as 10 divided by 10 is 1, and 1 multiplied by 100 is 100.

A 10-Year-Old Child with a Mental Age of Ten Would