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About PlayMemorize Facts

PlayMemorize Facts is a free true-or-false trivia game. Several statements appear, exactly one is true, and you pick it. One wrong answer ends the run - how long a streak can you build?

Generative, not hand-written. Every statement is produced on the fly from a pool of fact schemas - prime numbers, perfect squares, divisibility, arithmetic, month lengths, and country flags. No two rounds look the same, and there are no questions to run out of.

Built for all 25 languages. Country names come from the browser's Intl.DisplayNames, month names come from Intl.DateTimeFormat - so the game speaks every language PlayMemorize supports without a hand-translated question bank. Only the short sentence frames are localised.

Adjustable difficulty. Filter by category (math, calendar, geography) to focus your practice, or choose from 2 to 6 answer options. Fewer options is easier; more options forces you to verify every claim.

Part of the PlayMemorize family of free brain-training games.

Vanliga frågor

Q: What is PlayMemorize Facts?

A free multiple-choice trivia game. Several statements appear, exactly one is true, and you pick the true one. One wrong answer ends the run - your best streak is saved locally.

Q: Are the questions hand-written?

No. Every statement is generated on the fly from schemas like "{n} is prime", "{month} has {n} days", or "{flag} is the flag of {country}". The underlying data is correct by construction, so there is never a typo or factual error.

Q: Does it work in my language?

Yes. Facts is fully localised into all 25 PlayMemorize languages. Country names come from the browser's built-in Intl.DisplayNames API and month names from Intl.DateTimeFormat, so every locale gets native-language terminology automatically.

Q: What categories are there?

Math (primes, perfect squares, divisibility, arithmetic, squares of integers), Calendar (days in each month), and Geography (country flags and names). You can play "All" or restrict to a single category.

Q: Is it free?

Yes, completely free. No account, no ads, no paywalls. High scores are stored locally in your browser.