Alhazen's problemW
Alhazen's problem
Angle trisectionW
Angle trisection
Birthday problemW
Birthday problem
Block-stacking problemW
Block-stacking problem
Boundary value problemW
Boundary value problem
Clock angle problemW
Clock angle problem
Doubling the cubeW
Doubling the cube
Eight queens puzzleW
Eight queens puzzle
Firing squad synchronization problemW
Firing squad synchronization problem
Guillotine problemW
Guillotine problem
Hadwiger–Nelson problemW
Hadwiger–Nelson problem
Hansen's problemW
Hansen's problem
Happy ending problemW
Happy ending problem
Illumination problemW
Illumination problem
Invariant subspace problemW
Invariant subspace problem
Josephus problemW
Josephus problem
Kirkman's schoolgirl problemW
Kirkman's schoolgirl problem
Klee's measure problemW
Klee's measure problem
Knight's tourW
Knight's tour
Moment problemW
Moment problem
Monty Hall problemW
Monty Hall problem
Mountain climbing problemW
Mountain climbing problem
Mrs. Miniver's problemW
Mrs. Miniver's problem
Napkin ring problemW
Napkin ring problem
Necklace splitting problemW
Necklace splitting problem
No-three-in-line problemW
No-three-in-line problem
Oberwolfach problemW
Oberwolfach problem
Orchard-planting problemW
Orchard-planting problem
Plateau's problemW
Plateau's problem
Regiomontanus' angle maximization problemW
Regiomontanus' angle maximization problem
Seven Bridges of KönigsbergW
Seven Bridges of Königsberg
Snellius–Pothenot problemW
Snellius–Pothenot problem
Square trisectionW
Square trisection
Squaring the circleW
Squaring the circle
Squaring the squareW
Squaring the square
Three utilities problemW
Three utilities problem
Turán's brick factory problemW
Turán's brick factory problem
Water pouring puzzleW
Water pouring puzzle
Znám's problemW
Znám's problem