Revision history of "2006 OIM Problems/Problem 4"

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  • (cur | prev) 16:04, 14 December 2023Tomasdiaz (talk | contribs). . (335 bytes) (+335). . (Created page with "== Problem == Find all pairs <math>(a, b)</math> of positive integers such that <math>2a + 1</math> and <math>2b - 1</math> are relative primes and <math>a + b</math> divides...")