Someone here asked about IQ ... I answer.
IQ (intelligence quotient) can be translated as "amount of intelligence." In Russian, such a well-established expression as "intelligence quotient" is often used. In order for the test results to be reliable, so that the results are as truthful as possible, it is necessary to take into account not only the results of the test itself, but also take into account the gender and age of the test taker.
Some people think that test results are a way to show a person's tendency to a particular type of task and, therefore, one can prepare for the test by solving problems such as presented in the test tasks.