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He entered Harvard University at age 11 and, as an adult, was claimed by family members to have an IQ between 250 and 300, and to be conversant in about 25 languages and dialects.
- John W. Shattuck, Frank Folupa, Parker Greene, Jacob Marmor
- July 17, 1944 (aged 46), Boston, Massachusetts, U.S.
- April 1, 1898, Manhattan, New York City, U.S.
Aug 14, 2022 · As for William James Sidis, he had an estimated IQ of around 250 to 300. Anybody with a high IQ will be happy to tell you it’s meaningless (though they’ll probably still be a little smug). But Sidis was so smart that his IQ was the same amount as three average human beings combined.
Jan 20, 2021 · William James Sidis – a Child Prodigy at 18 Months Old William had an IQ of 250 to 300 . To give you some idea of just how smart William was, an average IQ is 90 to 109.
Nov 24, 2021 · Though no scorecards or test reports concerning his intelligence exist today, considering Sidis’ age and academic brilliance, his IQ score is estimated by some to be somewhere between 50...
Jan 11, 2024 · 5 min read. ·. Jan 11, 2024. A Brief History of William James Sidis. William James Sidis photographed at his Harvard graduation in 1914. Public Domain. The average person’s IQ is between 90...
Nov 7, 2006 · Though he probably would not have put much stock in formal measures of intelligence, Sidis’s sister later claimed that a psychologist had administered an IQ test on her brother, arriving at an estimated score of 250-300. In such a test, 100 is average and over 140 is considered genius.
May 26, 2021 · His IQ was thought to be 50 to 100 points higher than Albert Einstein's. William James Sidis was perhaps, as National Public Radio suggested in 2011, the smartest guy ever.
