The following articles contain lists of problems. This includes unsolved problems, which may refer to several notable conjectures or open problems in various academic fields:
Natural sciences, engineering and medicine
- List of unsolved problems in astronomy
- List of unsolved problems in biology
- List of unsolved problems in chemistry
- List of unsolved problems in geoscience
- Unsolved problems in medicine
- List of unsolved problems in neuroscience
- List of unsolved problems in physics
Mathematics
- List of unsolved problems in mathematics
- List of undecidable problems
- List of NP-complete problems
- List of PSPACE-complete problems
- List of problems in loop theory and quasigroup theory
Social sciences, statistics, and information sciences
- List of unsolved problems in economics
- List of unsolved problems in fair division
- List of unsolved problems in statistics
- List of unsolved problems in computer science
- List of unsolved problems in information theory