How to use Rare Answer Trivia
- Choose a category. Each practice prompt has a clearly defined set of accepted answers.
- Type an answer and press Enter. Names and the listed common aliases are accepted without case or accent differences.
- Aim for three different answers, or keep going for more. Ask for a hint or reveal the answer notes whenever you like.
- Move to the next prompt at your own pace. Your progress is saved in this browser when storage is available.
A little help along the way
- Move through a category systematically. For planets, consider order; for places, think through a map rather than guessing at random.
- A hint helps you retrieve a fact. After the round, read the short notes and try again without the hint.
- The accepted answer list is deliberately limited and shown after reveal. Check the source and scope before treating a missing answer as incorrect in the wider world.
Three categories, thirty prompts
Practice nature, science and geography at your own pace. Each round has a stated answer scope and a reference you can check. Begin with planets or bear species, then try cloud classifications, element names or regional geography.
Fact references
- International Association for Bear Research and Management ↗
- WMO International Cloud Atlas ↗
- WMO cloud species ↗
- IUCN Red List categories ↗
- OpenStax, organizing life ↗
- WWF, the Amazon ↗
- Hong Kong Observatory, calendar cycle ↗
- Hong Kong Observatory, solar terms ↗
- FCI breed nomenclature ↗
- International Commission on Stratigraphy ↗
- NASA planets ↗
- IUPAC periodic table ↗
- BIPM SI prefixes ↗
- NASA Moon phases ↗
- NASA list of 88 constellations ↗
- United Nations M49 regions ↗
- Government of Canada, provinces and territories ↗
- US Census state names ↗
- European Union enlargement history ↗
For the original daily rare-answer game and its Unlimited mode, visit Krillion ↗.
Good questions
Is this Krillion Unlimited?
This is an independent trivia practice game with original prompts, hints, answer notes, and no timer. Krillion has its own daily game and Unlimited mode. This tool is intended for category learning and does not reproduce its puzzles, answer bank, or scoring.
How is a rare answer scored?
We count different correct answers you find, not global rarity. There is no claim about the percentage of players who chose an answer. Our progress score is simply the number of accepted answers found in this browser.
Why was my answer not accepted?
Each prompt has a curated answer list and a stated scope. Some valid answers outside that scope may be absent. Use Reveal answers to inspect the list, explanations, and original reference. Names, symbols, and selected common aliases are supported.
Are my answers saved or sent anywhere?
Practice progress stays in local browser storage when available. It does not sync across devices. Clearing site data removes it. Typed answers are not sent to a server or included in gameplay analytics.
30 original prompts with curated answers and factual references. Independent of Krillion and other daily trivia games. Updated 2026-10-13.