Revision history of "KGS math club/solution 9 1"

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  • (cur | prev) 05:42, 4 March 2010Zahlman (talk | contribs). . (629 bytes) (+629). . (Created page with 'Proof by contradiction. Let S_1 = 9, S_2 = 99, etc. Consider the first N values of the set. Since none of this (assumed) is divisible by N, they are all != 0 modulo N. Hence, …')