Problem (disambiguation) Millennium Prize Problems Hilbert's problems List of unsolved problems in mathematics Smale's problems Covering problems Proximity problems Mathematical problem Lists of unsolved problems Karp's 21 NP-complete problems Decision problem 99 Problems List of unsolved problems in statistics List of philosophical problems Problem solving Fuckin' Problems List of unsolved problems in chemistry Optimization problem List of unsolved problems in computer science Knapsack problem Computational problem Landau's problems Sosy Problems Wicked problem List of unsolved problems in astronomy Animal Problems Fleet problem List of NP-comp…

plete problems Computer-induced medical problems Constraint satisfaction problem Champagne Problems (album) Open problem Lattice problem Riemann–Hilbert problem Mo Money Mo Problems Hard problem of consciousness Boundary value problem List of undecidable problems Economic problem Champagne Problems Boy Problems Pebble motion problems Function problem List of unsolved problems in physics Problems in Latin squares No Problems Glossary of chess problems Travelling salesman problem Fake Problems List of unsolved problems in neuroscience Open Problems in Mathematics Inverse problem Math an

d Other Problems Unsolved problems in medicine Kepler problem Problems of Post-Communism Vehicle routing problem Hamiltonian path problem List of problems in loop theory and quasigroup theory Lists of problems Trolley problem Poems and Problems The Public and Its Problems Hundred-dollar, Hundred-digit Challenge problems P versus NP problem Social Problems Behrens–Fisher problem The Problems of Philosophy Dirichlet problem The Great Mathematical Problems Luxury Problems Problem of evil Packing problems No Problem Büchi's problem Shortest path problem Transcomputational problem Graph sandwich problem Welfare Problems XY problem Word problem First World problem Maximum flow problem List of unsolved problems