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Revision history of "2011 IMO Shortlist Problems/A1"

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  • (cur | prev) 05:44, 28 October 2013‎ DANCH (talk | contribs)‎ . . (500 bytes) (+500)‎ . . (Created page with "==Problem== Given any set <math>A = \{a_1, a_2, a_3, a_4\}</math> of four distinct positive integers, we denote the sum <math>a_1 +a_2 +a_3 +a_4</math> by <math>s_A</math>. Let <...")
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