One fresh brain teaser every day. Build your streak, sharpen your mind, and learn from history's greatest thinkers.
A few minutes of focused reasoning a day keeps your mind sharp. Each challenge pairs a teaser with a story about one of history's geniuses — from Einstein to Marie Curie — so you learn something new while you play. Come back tomorrow to keep your streak alive. Explore deeper any time in our collection of 14,000 geniuses or measure yourself on the free IQ test.
Note: The Daily Genius Challenge is for fun and learning. Brain-teaser answers are classic puzzles; IQ figures attributed to historical figures are popular estimates, not measured values.