OPM 2009 Problem 1
- Final day 1
A circumference was divided in equal parts. On each of these parts one number from to was placed such that the distance between consecutive numbers is always the same. Numbers , and were in consecutive positions. In how many parts was the circumference divided?
Dataset text AI-MO AoPS. Quoted with source.
Official text: Portuguese Mathematical Olympiad 2009 official paper, page 1.
Solutions
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