Emma R. Hasson is Scientific American’s Games ace and a Ph.D. candidate in mathematics at the City University of New York ...

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A functioning Gizmo would never lie and call a good Gizmo broken, so if one declares the other to be malfunctioning, they can’t both be good. Either one of the two Gizmos is functioning and correctly ...

This viral math puzzle is a great way to boost your brain power. Try to solve the final equation using logic and attention to ...

Only intelligent minds can solve this math puzzle by finding the missing value in 17 seconds. Are you one of them? Try now!

IIIF provides researchers rich metadata and media viewing options for comparison of works across cultural heritage collections. Visit the IIIF page to learn more. The book Mathematical Puzzles and ...