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Countries by Shortest Substring
Name countries of the world from the shortest substrings that uniquely identify each country.
Example: Given apple, grape, and orange, substrings L, GR, and O uniquely identify each item.
Example: Given apple, grape, and orange, substrings L, GR, and O uniquely identify each item.
Country names are from the Countries of the World Quiz
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Last updated: December 4, 2025
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| First submitted | December 2, 2025 |
| Times taken | 311 |
| Average score | 43.9% |
| Rating | 4.86 | Report this quiz | Report |
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Quiz series by OtterSou
1. For each substring length n, starting from n=1, List all substrings of all countries ignoring spaces and diacritics (e.g. substrings of length 3 of Sri Lanka is SRI, RIL, ILA, LAN, etc.)
2. A substring is the shortest substring of a country if:
- The substring uniquely identifies a country and it has no shorter unique substring
- The substring is the entire country name, even if it's ambiguous (e.g. MALI, which is also a substring of Somalia)