Where do you find math problems to do for fun?

Here on bsky/social media.
23.8% (5)
Past contest papers/books.
19.0% (4)
Stack Exchange.
28.6% (6)
Elsewhere (please specify).
28.6% (6)

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Posted by @makeaproblem.bsky.social on 5/1/2026, 7:25:54 PM