Answer :
Final answer:
A 6-year-old child with a mental age of 9 has an IQ score of 150. The child is considered 'gifted' as they are performing at a level typically expected of a 9-year-old. Other factors also contribute to a child's success despite a high IQ score.
Explanation:
The Intelligence Quotient, or IQ, is calculated by dividing the mental age of the child by their chronological age, and then multiplying the result by 100. This is otherwise known as the Stern's formula for IQ. The mental age is the age that corresponds to the average individual's performance on an intelligence test. If a 6-year-old child has a mental age of 9, their IQ will be (9/6) * 100 = 150.
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