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Omni-MATH / Find the smallest integer n such that each subset of 1,2,…,2004 with n elements has two distinct elements a and b for which a²−b² is a multiple of 2004. · Discussion

Discussing Find the smallest integer n such that each subset of {1,2,…,2004} with n elements has two distinct elements a and b for which a²−b² is a multiple of 2004. · Omni-MATH

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