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Omni-MATH / Find the smallest positive integer K such that every K-element subset of 1,2,...,50 contains two distinct elements a,b such that aplusb divides ab. · Discussion
Discussing Find the smallest positive integer K such that every K-element subset of {1,2,...,50} contains two distinct elements a,b such that aplus{}b divides ab. · Omni-MATH
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