Intelligence quotient is calculated as:

Ans. A. Mental age/ Chronological age x100An intelligence quotient (IQ) is a total score derived from several standardized tests designed to assess human intelligence. The intelligence quotientIntelligence quotient (IQ) refers to mental age (MA) expressed as a ratio of chronological age (CA) multiplied by 100. Intellect comprises perception, memory, recognition, conceptualization, convergent and divergent reasoning, verbal ability and motor competence. . There are various intelligence tests that have been devised. Few of them are Phataak adaptation of Bayley scale, Kulshrestha adaptation of Standford Binet test.