Test your logical reasoning with 8 pattern questions
This quiz is explicitly labelled as a logic puzzle score, not an IQ test. That distinction matters and the reason it matters is worth explaining.
Intelligence Quotient tests are standardised psychometric instruments developed to measure general cognitive ability — the "g factor" — across multiple domains: verbal reasoning, working memory, processing speed, and perceptual reasoning. Validated IQ tests (Wechsler, Stanford-Binet, Raven's Progressive Matrices) are administered by trained professionals, normed on large representative samples, and have extensive reliability and validity data. They produce a score that positions the test-taker relative to the population distribution, with 100 as the median and standard deviation of 15.
An online quiz with 8–10 questions cannot measure IQ. The sample size is too small, there is no standardised norming, there is no professional administration controlling for external factors, and the questions have not undergone the psychometric validation process that makes IQ scores meaningful. Calling it an IQ test would be misleading.
What a well-designed logic quiz can measure: your performance on a specific set of reasoning puzzles, which correlates broadly with general reasoning ability. It is a useful exercise. The score reflects how many problems you solved correctly, which depends on your reasoning skill, your familiarity with the puzzle types, your current alertness, and chance. It is not a stable measure of fundamental cognitive capacity.
The best logic puzzles are not hard because they require complex reasoning — they are hard because they exploit predictable intuitive errors. The bat-and-ball problem (bat and ball together cost £1.10; bat costs £1 more than ball; how much is the ball?) has a correct answer of 5p, but the intuitive answer is 10p. Most people get it wrong initially. This is not a test of intelligence — it is a test of whether you override your first intuition and check the arithmetic.
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