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.

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.

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.

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.

How does my progress save?

High scores are stored locally in your browser.

Facts | PlayMemorize

Spot the one true statement. Math, calendar, and geography facts generated on the fly

Spot the one true statement. Math, calendar, and geography facts generated on the fly.

Enable JavaScript to play.