IQ-Style Reasoning Test

IQ stands for intelligence quotient. It is a score from standardized tests that measure certain thinking skills, such as reasoning, working memory, and processing speed. Scores are scaled so that the average is 100. IQ is a useful research tool, but it covers only part of what people mean by intelligence.

By design, the average IQ is 100, with a standard deviation of 15. That means about two out of three people score between 85 and 115 on a properly normed test. Scores far from 100 in either direction are less common.

No, not in a clinical sense. It has only 20 puzzles, no norms from a supervised sample, and no control over the testing conditions, so your estimate can easily vary by ten points or more. It is meant for fun and self-reflection, not for any official use.

Scores can change, especially in childhood and with education. Practicing a specific puzzle type will make you better at that type, though it does not necessarily raise general reasoning. Good sleep, health, learning, and lower stress all help you think more clearly on any given day.

IQ is linked, on average, to outcomes like school performance and some job measures, but the link is far from perfect. Effort, habits, social skills, health, opportunity, and luck also play large roles. Many people succeed with average scores, and a high score guarantees nothing.

Most people finish the 20 puzzles in about 10 to 20 minutes. There is no time limit, so you can work at your own pace. It helps to note how long you took, since rushing or taking breaks can affect the result.

Yes, it is completely free. There is no sign-up, no email request, and no paywall to see your results. Your answers are processed in your browser, and the result shows up as soon as you finish.