MathPages
A dense, decades-old archive of essays working through recreational and research-level math problems, from number theory curiosities to physics puzzles.
No account needed · sign in to keep your taste everywhere
More like this
Pages that share MathPages's themes. Or browse all of Education.
Tanya Khovanova's Math Page
Home page of a mathematician with popular essays, puzzles, number-theory curiosities and a weekly math blog, covering ma…
Math Challenge
A free archive of hundreds of recreational number theory and combinatorics puzzles, organized by topic and difficulty fo…
Singingbanana
Mathematician James Grime's site of recreational math curiosities, from intransitive dice to prime number oddities, writ…
Tanya Khovanova's Math Blog
A mathematician's blog of original puzzles, wordplay riddles, and recreational number theory problems, written with a re…
Open Middle
A free library of open-ended math problems with a fixed beginning and end but many possible paths, designed to spark dee…
MetaNumbers
A number encyclopedia that shows everything about any positive integer you enter: prime factorization, divisors, binary…
Stumble onto more like this
One click takes you to a page you didn't know you were looking for. Rate it and the next one lands closer to your taste.
Add to Browser — it's freeWorks in Chrome, Edge and Brave. No account needed.