IQ tests are designed to assess the human intelligence. While they are somewhat controversial, there is no doubt that they have some relevance in assessing a persons intelligence. The average human has a IQ score of 100 and each 15 points up or down are considered a standard deviation. Approximately two thirds of all people score between 85 and 115. Only about 2.5% of the population score above 130, do you think you belong in this category?
To assess a persons intelligence, usually a series of non-verbal and verbal tasks or puzzles are asked. Usually, you are being instructed to complete a sentence or to find a missing piece in a puzzle. More advanced tests also require you to perform logical tests like calculations.