Problems in Mathematics
The Four Colour Theorem	Pierre de Fermat
Squaring a Circle	Goldbach's conjecture
Hadamard Matrix	Angle Trisection
Andricas Conjecture	Kepler Conjecture
Hilbert's Problems	Twin Primes
Collatz Problem	Happy End Problem
Landau's Problems	Poincaré Conjecture
Pólya Conjecture	Dodecahedral conjecture