IQ is a score that identifies how far above or below someone is in comparison to others' mental ability, according to Mensa International
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Participants get points by finishing standardized assessments that gauge their aptitude for memory, puzzle-solving, and other skills
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An IQ score of less than 85 is considered weak, whereas 130 or higher is considered smart and only 2 per cent population is above that
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Chinese-American mathematician Terence Tao is said to have the highest IQ score in the world with a score between 225-230
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Marilyn Vos Savant had an IQ of 228, which earned her a Guinness World Record until they deleted the category in 1990 because the results were considered inexact
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William James Sidis is considered to be the smartest person who has ever lived. He graduated from Harvard University aged 16
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Although Albert Einstein never took the test, many assume his IQ to be around 160 referencing his numerous scientific achievements
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Stephen Hawking showed that black holes radiate energy, slowly shrink, and explode in a flash of gamma-ray. He had an estimated IQ of 160
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Leonardo Da Vinci, famed painter, mathematician and cartographer, is estimated to have had IQ scores ranging between 180 to 220
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Christopher Michael Langan is said to have an IQ of 195. He supported conspiracy theories and claimed that maths can prove God's existence