Famous Math Problems

Here is a list, in no particular order, of some famous math problems, puzzles, and questions:

Königsberg Bridges

Zeno's paradox

Fermat's Last Theorem

Three Construction Problems of Antiquity

Euclid's Parallel Postulate

See Euclidean and Non-Euclidean Geometry for more information.

Riemann Hypothesis

Four Colour Theorem

Travelling Salesman problem