Many organizations use psychometric tests when making recruitment and promotion decisions. Some of these tests measure your ability to reason, problem solve, decide and learn, which psychologists define as General intelligence or G factor.
Although some early studies revealed that you didn’t have much control over your intelligence, because it was genetic, the real fact is that you can train your brain and increase your intelligence, and the more you train, the more you gain. It is very useful to train doing problems that don't resemble the previous ones you have done, but doing problems similar to the test questions as well, because you will avoid wasting time understanding what you have to do.