Intelligence has many definitions, but the heart of the matter is that it enables you to solve a range of problems quickly and adequately. You can think swiftly and effectively. That is also a reason why intelligence tests are popular with employers for staff selection purposes. When employees are able to resolve problems quickly and effectively, an organisation is likely to perform better on average than the competition. Intelligence tests consist of various sub-tests, often verbal, numeric and figurative. Your results are compared to those of many others, often on the basis of level of education. In this way, it is easier to assess whether your cognitive ability is in line with your educational level.