Iq =MA (intellectual age) /CA (actual age) × 100.

IQ test generally includes eleven items, including common sense, comprehension, arithmetic, similarity, memory, words, images, building blocks, arrangement, puzzles, symbols and so on. Psychologists use IQ test as a tool to test people's intelligence level, and use IQ to show the quality of intelligence.

Extended data:

Proportion of IQ scores in the population:?

About 50% of the population's IQ is between 90- 1 10, that is, about 25% of the population's IQ is below 90 (according to the definition, IQ 100 is of course the average intelligence level of the population).

The IQ is between 1 10 and 120, accounting for about14.5% of the population; About 7% of the participants were between 120 and 130, and about 3% were above 140, accounting for only 0.5% of the population.

On the side of low intelligence, there is a similar distribution. For example, the IQ is between 70 and 80, with 7% and so on. Visible, "genius" and "slow" people are very few; Most people have average intelligence.

Baidu Encyclopedia-IQ Test Method