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r/mathriddles↗

Challenging math and logic riddles

This subreddit is for anyone to share math or logic related riddles, and try and solve others. Come check it out! This subreddit is designed for viewing on old.reddit.com.

31k subscribers41 posts / mo in Sep 202630 authors / mosince 2014

r/mathriddles has 31k members (+8.3% over the last 12 months). It gets about 41 posts a month from 30 people. Top topics: Math Equations, Sacred Geometry and Puzzle Help.

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When to post on r/mathriddles

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Size and growth

How r/mathriddles has grown

r/mathriddles

Subscriber growth

Subscribers over time

+8.3%in 12 months · +1.9% in 3 months
Oct 202631k
Growing31k subscribers
Data since Mar 2018Live · through Oct 2026
r/mathriddles

Monthly activity

Posts, comments and authors per month

−16%vs Sep 2025 · +65% last 3 months vs the 3 before
Sep 202641
QuieterPeaked at 98 in Oct 2022
Data through Sep 2026 · October usually lands mid-November

What people talk about

Topics and brands on r/mathriddles

Top topics

Share of the subreddit's posts

  1. Math Equations2.8%
  2. Sacred Geometry0.8%
  3. Puzzle Help0.8%
  4. Puzzle Solving Adventures0.7%
  5. Chess Tactics and Positions0.7%

Brands people mention

Most-mentioned brands and sites, last 12 months

  1. Desmos
  2. Medium
  3. Apple
  4. arXiv.org e-Print archive
  5. GeoGebra

The full report

Everything else about r/mathriddles

Posting rules and account requirements, how often posts get removed, who writes here (age, gender, countries), what people ask for, how they talk, and related subreddits — all in the full report.

Posts and activity for Sep 2026. Members from Reddit's subscriber counts. Read from the same data the app runs on. Our research