Category:Open problems
Appearance
![]() | Pages in this category should be moved to subcategories where applicable. This category may require frequent maintenance to avoid becoming too large. It should directly contain very few, if any, pages and should mainly contain subcategories. |
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Use subcategories where applicable, e.g. Category:Unsolved crimes, Category:Unexplained disappearances. For open disputes, use Category:Controversies.
Subcategories
This category has the following 29 subcategories, out of 29 total.
- Lists of unsolved problems (16 P)
C
D
- Date of birth unknown (2,093 P)
- Date of death unknown (1,294 P)
E
- Economic puzzles (18 P)
H
I
L
P
- Place of birth unknown (874 P)
- Place of death unknown (476 P)
S
- Year of song unknown (806 P)
U
W
Y
Pages in category "Open problems"
The following 23 pages are in this category, out of 23 total. This list may not reflect recent changes.