this post was submitted on 26 May 2026
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I remember doing combinatorics puzzles and number theory exercises in platforms like Brilliant when I had a bit of free time. All the while learning something. But the last time I tried Brilliant I did not enjoy it as much and I can't afford it not anyway.

Does anyone have any recommendations of websites (or webrings), apps or games about or that touch on:

  • combinatorics puzzles
  • modular arithmetic puzzles
  • concepts or exercises of number theory
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[–] Nora@lemmy.dbzer0.com 9 points 5 months ago

Nerdle is a daily math based worldle that is quite fun IMO.

[–] 48954246@lemmy.world 7 points 5 months ago

If you're on android check out the puzzle suite app on fdroid

https://f-droid.org/packages/com.sidhant.puzzle

[–] Pamasich@kbin.earth 7 points 5 months ago

The problems are designed for programmers, but Project Euler comes to mind.

[–] squirrel@cake.kobel.fyi 4 points 5 months ago

The @daily_fourmula@lemmy.ml bot posts math puzzles daily to !dailygames@lemmy.zip

[–] triptrapper@lemmy.world 4 points 5 months ago

If you like geometry and trig, the apps Pythagorea and Euclidea are very fun puzzles. They're free and there are hundreds of puzzles. They get very difficult.

[–] joshchandra@midwest.social 3 points 5 months ago

The app Mental Math actually improved my mental math indeed! While division can typically be estimated because it never goes into mixed numbers/fractions, it does eventually go into 5 digits' worth of all the 4 basic operations; you set the difficulty and climb as you like. I'd never multiplied so accurately in my life, haha.

[–] thelasthippo@lemmy.world 2 points 5 months ago

i like simple math, i love this app. just cruise through; even has tutorials for tricks and stuff.

its called FastMath

https://apps.apple.com/app/id1551025256 Download FastMath for free from the Apple App Store.