What is a normal IQ?

IQ is a 200-point scale. Those with a score of 90 to 110 are within the normal intelligence range, those with a score of 120 to 140 are considered smart, and those with a score of 140 or above are called geniuses. The lower the score, the worse the intelligence. Those with scores below 70 are intelligent. IQ is a quantitative indicator that indicates the level of a person's intelligence. It was proposed by German psychologist Stern in 1912. IQ is the abbreviation of intelligence quotient, which is expressed in English as IQ. IQ is the quotient calculated by dividing mental age by biological age. The calculation formula of IQ is as follows: IQ=MA÷C.A×100. IQ indicates how smart a person is. The higher the IQ, the more intelligent you are. Biological age refers to a child's actual age after birth. Mental age or psychological age is the age measured based on intelligence measurements.