n an intelligence test a 10-year-old child was found to have a mental age of 12 years. His IQ is:
In an intelligence test a 10-year-old child was found to have a mental age of 12 years. His IQ is:
(a) 100
(b) 120
(c) 105
(d) 95
✅ Correct option: (b) 120
Explanation: IQ = MA/CA × 100 = 12/10 × 100 = 120.