Who has 400 IQ?

Who has 400 IQ?

Intelligence Quotient (IQ) is a measure of cognitive ability. It is used to determine a person’s intelligence level. The average IQ score is 100. Anything above 130 is considered exceptional intelligence. But who has a 400 IQ? Is it even possible for someone to have such a high IQ score?

Name IQ Score Source
William Sidis 250-300 Historical accounts
Marilyn vos Savant 228 Guinness World Records
Kim Ung-Yong 210 Guinness World Records

William Sidis

William James Sidis was an American prodigy born in 1898. He had an exceptional ability to learn and understand complex mathematical concepts from an early age. By the age of 11, he had started attending Harvard University. He was reported to have an IQ score of 250-300, making him the person with the highest IQ score ever recorded.

Marilyn vos Savant

Marilyn vos Savant is an American columnist, author, and public speaker. She gained popularity after being listed in the Guinness World Records for having the highest IQ score in the world. She scored 228 on the IQ test. She has written several books and columns, including ones on how to increase your IQ score.

Kim Ung-Yong

Kim Ung-Yong is a Korean child prodigy born in 1962. He started speaking at the age of 6 months and was able to read Japanese, Korean, German, English, and Spanish by the age of 4. At the age of 7, he entered university. He was listed in the Guinness World Records for having an IQ score of 210.

Are IQ Scores Reliable?

IQ tests are designed to measure intelligence, but they are not always reliable. The accuracy of IQ scores can be affected by several factors, including cultural and socio-economic backgrounds. Furthermore, IQ tests only measure certain aspects of intelligence, such as logical reasoning and problem-solving skills. They do not take into account other factors such as emotional intelligence and creativity.


While there have been reports of individuals with exceptionally high IQ scores, it is important to remember that IQ tests may not always provide an accurate measure of intelligence. Intelligence is a complex trait that cannot be measured by a single test.

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