Mathematical problem

Hilbert's seventh problem maximum flow problem moving sofa problem Smale's problems Hilbert's third problem Napoleon's problem mean value problem Cap set multi-armed bandit minimum-cost flow problem Whitehead problem three utilities problem Seven Bridges of Königsberg birthday problem Tammes problem Moment problem Ménage problem computational problem Thirty-six officers problem dining cryptographers problem urn problem German tank problem balance puzzle Hilbert's fifth problem Illumination problem Newton's minimal resistance problem mice problem Malfatti problem Hilbert's twenty-first problem Crossed ladders problem irregularity of distributions firing squad synchronization problem Banach's matchbox problem Hilbert's fourth problem Hilbert's fourteenth problem Alhazen's problem Goldbach's conjecture bankruptcy problem mathematical chess problem Carpenter's rule problem Circulation problem Constant problem Cousin problems Dutch national flag problem Network flow problem hearing the shape of a drum Heilbronn triangle problem Hilbert's eleventh problem Hilbert's fifteenth problem Hilbert's nineteenth problem