Who was smarter?

Side-by-side IQ estimates for famous pairs, from Einstein vs Newton to Musk vs Jobs. Each comparison shows both estimates, how each person thought, and why the numbers are estimates rather than test scores.

What's your IQ?

Take the IQ test

25 questions · about 12 minutes

What would you score? Try question 1.

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Browse by person

The 20 highest estimates among historical figures. Open a profile to see the evidence and its comparisons.

What's your IQ?

Find out where you sit next to history's great minds: 25 visual reasoning questions.

Take the IQ test

25 questions · about 12 minutes