The value of IQ is called IQ, and the standard numerical test is 200 points. It is generally believed that the score of 85- 1 15 belongs to the normal range. < 70 belongs to low intelligence, 120- 140 belongs to smart people, and the score > 140 can be considered as a genius. This range can fluctuate slightly, because the test scores may be disturbed by special factors such as environment or tension, resulting in unbalanced scores. Therefore, a fluctuation of 85- 1 15 can be considered as a normal value.

Generally speaking, the IQ of a normal person is between 90~ 1 10, which is related to many factors, such as heredity, age and education level. However, the IQ of ordinary people is not much different, so there is generally no need to worry too much.