Answer :
If a 10-year-old can perform the same tasks as the average 15-year-old, then the child's "mental age" is 15, and their "IQ" is 150.
The concept of mental age, introduced by Alfred Binet, refers to an individual's level of cognitive functioning compared to others in their age group. It is a measure of intellectual development. In this case, the 10-year-old's mental age is considered to be 15 because they can perform tasks typically expected of a 15-year-old.
IQ (Intelligence Quotient) is a standardized measure of intelligence. It is calculated by dividing an individual's mental age by their chronological age and multiplying it by 100. In this scenario, if the 10-year-old's mental age is 15, their IQ would be 150 (15/10 * 100 = 150).
Therefore, the child's mental age is 15, and their IQ is 150.
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