Category:Unsolved problems

Unsolved problems: category for problems of a theoretical nature. See list of unsolved problems
 * Not for factual questions (e.g. Marie Celeste, etc): these belong in Category:Mysteries, or another of its subcategories, like Category:unsolved crimes.
 * Not for practical disputes (e.g. pollution, Middle East conflict). Perhaps try Category:Controversies or Category:Conflict.

ar:تصنيف:مسائل غير محلولة es:Categoría:Problemas no resueltos ko:분류:미해결 문제 id:Kategori:Masalah yang belum terpecahkan ja:Category:未解決問題 zh:Category:未解決的問題