Ivan Shishkin, Pine Forest

Weekly Problem Design Contest

Contest open

Little adventures

Starts Saturday, October 31, 2026 Deadline Friday, November 6, 2026 · Paris time Prize 100 reputation points

There are no restrictions on the subject matter, but your problem must be fully accessible to a 10-year-old child: the statement should be easy to understand, and it should be easy to start exploring, even without any prior experience. Beneath this apparent simplicity, however, there may lie beautiful ideas, or even some deep mathematics.

How entries are judged

  • Fit to the weekly theme
  • Originality
  • Mathematical interest
  • Clarity
  • Presentation

Rules

One entry per person. You may edit your problem until Friday at 23:00, Paris time. Admins select one winner and may also award honorable mentions. Translations of the same problem count as one entry.

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Entries

3
25Adventures on the German AutobahnAnduril15Un étrange billardFRFiniteField1Space AdventureAnatoill

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