The top 15 who appear on this list were compiled by Libb Thims — an American engineer who compiles high IQ scores as a hobby — using the results of Simonton's study.. Because IQ scores weren'tRelated: The Top 10 Smartest People in the World. 1. William James Sidis – IQ Score: Estimated 250-300. Now, let’s shine the spotlight on William James Sidis, an American child prodigy born in The results were that Tony was "gifted", as he was tested with an IQ of 144, so school advisers recommended placing him in advanced classes. Hawk attended Jean Farb Middle School from 1980 to 1981. His parents supported his skateboarding because it served as an outlet for his excess energy.
Bearing these caveats in mind, it is generally believed that the highest IQ score ever recorded is that of William James Sidis, who is believed to have had an IQ of between 250 and 300. This would
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