Uncommon Trivia · Puzzle #21
Daily Trivia Answers for October 15, 2026
Replay the puzzle below, then open the answer notes to see why the rarest answers score the most.
7 questions. 25 seconds each. One guess.
Name a correct answer few people would think of. The rarer it is, the more it scores.
- 10+Common
- 40+Uncommon
- 70+Rare
- 90+Legendary
Historical reconstruction: this content was observed on the production site or recovered from Git. The original publication and historical source review could not be verified. Saved scores are preserved; matching verified content versions can still be compared.
About Puzzle #21
Puzzle #21 was the Uncommon Trivia daily puzzle for October 15, 2026. It asked seven category questions, and every accepted answer is scored by how rarely its English Wikipedia page is viewed: the most viewed answer in each category earns 10 points and the least viewed earns 100. Play it above first if you want to avoid spoilers, then open the answer notes to see the most common and the rarest answers.
Rarity here comes from one public number per answer: the median of its monthly English Wikipedia page views over six full months, currently March to August 2026. Fewer readers means a rarer answer and a higher score. This edition freezes its answers and scoring data; future refreshes do not change this snapshot. For reconstructed history, the original publication remains unverified. Rarity is not a judgment of how important an answer is, only of how rarely people look it up.
Show the answer notes (spoilers)
1. Name a city that has hosted the Summer Olympics
23 accepted answers. Most viewed: London (232k views a month), Los Angeles (212k), Paris (160k). Rarest: Antwerp (38k views a month), Helsinki (47k), Stockholm (61k).
3 answers are worth 90 points or more (Legendary): Antwerp, Helsinki, and Stockholm.
Why Antwerp is the rarest answer here: its English Wikipedia article gets a median of 38k views a month, the fewest in this category. London, the most viewed answer, gets about 6 times as many (232k). A typical answer sits in the middle of the list: Amsterdam gets 92k views a month and scores 55 points.
2. Name a moon of Jupiter
73 accepted answers. Most viewed: Europa (39k views a month), Ganymede (39k), Io (36k). Rarest: S/2017 J 5 (93 views a month), S/2017 J 7 (103), Sponde (104).
9 answers are worth 90 points or more (Legendary): S/2017 J 5, S/2017 J 7, Sponde, S/2017 J 8, S/2017 J 2, S/2017 J 6, Eukelade, S/2017 J 9, and 1 more.
Why S/2017 J 5 is the rarest answer here: its English Wikipedia article gets a median of 93 views a month, the fewest in this category. Europa, the most viewed answer, gets about 419 times as many (39k). A typical answer sits in the middle of the list: Orthosie gets 333 views a month and scores 55 points.
3. Name a novel by Charles Dickens
15 accepted answers. Most viewed: A Tale of Two Cities (49k views a month), Great Expectations (44k), David Copperfield (35k). Rarest: Dombey and Son (3k views a month), Barnaby Rudge (3.3k), Martin Chuzzlewit (3.8k).
2 answers are worth 90 points or more (Legendary): Dombey and Son and Barnaby Rudge.
Why Dombey and Son is the rarest answer here: its English Wikipedia article gets a median of 3k views a month, the fewest in this category. A Tale of Two Cities, the most viewed answer, gets about 16 times as many (49k). A typical answer sits in the middle of the list: Our Mutual Friend gets 7.1k views a month and scores 55 points.
4. Name a country with a Mediterranean coastline
21 accepted answers. Most viewed: Israel (345k views a month), Turkey (310k), France (297k). Rarest: Tunisia (108k views a month), Libya (109k), Slovenia (131k).
3 answers are worth 90 points or more (Legendary): Tunisia, Libya, and Slovenia.
Why Tunisia is the rarest answer here: its English Wikipedia article gets a median of 108k views a month, the fewest in this category. Israel, the most viewed answer, gets about 3 times as many (345k). A typical answer sits in the middle of the list: Cyprus gets 195k views a month and scores 55 points.
5. Name a Nobel Prize in Physics laureate
225 accepted answers. Most viewed: Albert Einstein (326k views a month), Marie Curie (167k), Richard P. Feynman (103k). Rarest: Charles Édouard Guillaume (179 views a month), Clifford G. Shull (310), Horst L. Störmer (321).
28 answers are worth 90 points or more (Legendary): Charles Édouard Guillaume, Clifford G. Shull, Horst L. Störmer, Robert C. Richardson, Leo James Rainwater, Hans G. Dehmelt, Ben Roy Mottelson, Donald Arthur Glaser, and 20 more.
Why Charles Édouard Guillaume is the rarest answer here: its English Wikipedia article gets a median of 179 views a month, the fewest in this category. Albert Einstein, the most viewed answer, gets about 1,824 times as many (326k). A typical answer sits in the middle of the list: Reinhard Genzel gets 1.4k views a month and scores 57 points.
6. Name an official language of the European Union
24 accepted answers. Most viewed: English (256k views a month), Spanish (106k), French (91k). Rarest: Slovak (13k views a month), Latvian (15k), Estonian (15k).
3 answers are worth 90 points or more (Legendary): Slovak, Latvian, and Estonian.
Why Slovak is the rarest answer here: its English Wikipedia article gets a median of 13k views a month, the fewest in this category. English, the most viewed answer, gets about 20 times as many (256k). A typical answer sits in the middle of the list: Romanian gets 30k views a month and scores 53 points.
7. Name a country that uses the euro
21 accepted answers. Most viewed: Germany (329k views a month), France (297k), Spain (272k). Rarest: Latvia (113k views a month), Estonia (115k), Slovakia (118k).
3 answers are worth 90 points or more (Legendary): Latvia, Estonia, and Slovakia.
Why Latvia is the rarest answer here: its English Wikipedia article gets a median of 113k views a month, the fewest in this category. Germany, the most viewed answer, gets about 3 times as many (329k). A typical answer sits in the middle of the list: Belgium gets 160k views a month and scores 55 points.
The rarest answers in the October 15, 2026 puzzle
Uncommon Trivia never collects the answers players type, so this is not a ranking of what people guessed. It ranks the accepted answers from the puzzle's seven categories by their monthly English Wikipedia views, lowest first, with the points each one scores in its own category. To keep one category from filling the list, it takes at most two answers from each.
Show the 10 rarest answers (spoilers)
- S/2017 J 5 — Moon of Jupiter · 93 views a month · 100 points
- S/2017 J 7 — Moon of Jupiter · 103 views a month · 99 points
- Charles Édouard Guillaume — Nobel Prize in Physics laureate · 179 views a month · 100 points
- Clifford G. Shull — Nobel Prize in Physics laureate · 310 views a month · 100 points
- Dombey and Son — Novel by Charles Dickens · 3k views a month · 100 points
- Barnaby Rudge — Novel by Charles Dickens · 3.3k views a month · 94 points
- Slovak — Official language of the European Union · 13k views a month · 100 points
- Latvian — Official language of the European Union · 15k views a month · 96 points
- Antwerp — City that has hosted the Summer Olympics · 38k views a month · 100 points
- Helsinki — City that has hosted the Summer Olympics · 47k views a month · 96 points
Questions about Puzzle #21
What were the categories in Uncommon Trivia Puzzle #21?
The October 15, 2026 puzzle had seven categories: City that has hosted the Summer Olympics, Moon of Jupiter, Novel by Charles Dickens, Country with a Mediterranean coastline, Nobel Prize in Physics laureate, Official language of the European Union, and Country that uses the euro.
Which answer in Puzzle #21 is the rarest?
S/2017 J 5, an accepted answer to "Name a moon of Jupiter". Its English Wikipedia article gets 93 views a month, the fewest of any accepted answer in this puzzle, so it scores 100 points.
How are answers scored in Uncommon Trivia?
Each accepted answer is ranked within its category by the median of its monthly English Wikipedia page views over six full months, currently March to August 2026. The most viewed answer earns 10 points, the least viewed earns 100, and the rest are spaced evenly in between by rank. A wrong answer, or running out of the 25 seconds, scores 0.
Can I still play Puzzle #21?
Yes. The board at the top of this page replays the October 15, 2026 puzzle with the same seven categories, scored with the current view counts. Archive games don't change your stats or your daily streak.
When does the next puzzle come out?
A new puzzle unlocks for everyone at 00:00 UTC each day. Puzzle #22 followed on October 16, 2026, and today's puzzle is always on the home page.
More to play: today's puzzle, every past puzzle, or unlimited mode with random categories.