An Eysenck-style intelligence test: 20 questions covering number and letter series, verbal analogies, odd-one-out and visual pattern puzzles. You have 20 minutes. Work quickly but carefully — your score is converted to an IQ value on the standard scale (average = 100).
This test is modelled on the classic intelligence tests popularised by psychologist Hans Eysenck in his books such as "Know Your Own IQ". Like those tests, it mixes several kinds of reasoning: number series, letter series, verbal analogies, odd-one-out problems and — most distinctively — visual pattern puzzles where you must work out which figure logically continues a sequence or completes an analogy. The pictures are drawn with simple geometric shapes so that the puzzle, not the artwork, is what matters.
There are 20 questions and a 20-minute time limit, after which the test submits automatically. Your number of correct answers is mapped onto the standard IQ scale, where the population average is set to 100. Roughly: above 130 is very superior, 115–129 is superior, 85–114 is average, and below 85 is below average. Remember that no short online quiz can give a clinically valid IQ — proper testing uses standardised batteries administered by professionals. Treat your result as a fun benchmark of pattern-recognition and reasoning speed, then enter a nickname (up to 8 alphanumeric characters) to save it to the global leaderboard.