Assertion: IQ is calculated by dividing chronological age by mental age and multiplying by 100.
Reasoning: The number 100 is used as a multiplier to avoid the decimal point.
Answer & explanation
Correct answer: option 4
IQ refers to mental age divided by chronological age, and multiplied by 100.
The number 100 is used as a multiplier to avoid the decimal point. When the MA equals the CA, the IQ equals 100. If MA is more than the CA, IQ is more than 100. IQ becomes less than 100 when the MA is less than the CA.