Question: what is highest iq known?
Answer: Ainan Celeste Cawley (IQ score: 263)
William James Sidis (IQ score: 250-300)
Terence Tao (IQ score: 225-230)
Marilyn Vos Savant (IQ score: 228)
Christopher Hirata (IQ score: 225)
Kim Ung-Yong (IQ score: 210)
Edith Stern (IQ score: 200+)
Christopher Michael Langan (IQ score: 190 – 210)