DE-BUNDESWETTBEWERB 2002 Problem 1
- Round 1
Planet Ypsilon has a calendar similar to ours: A year consists of days, and every month has , or days. Prove that on Planet Ypsilon, a year must have months.
Dataset text AI-MO AoPS. Quoted with source.
Official text: Bundeswettbewerb Mathematik 2002 official paper, page 1.
Solutions
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