13 January 2019

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21 July 2017

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20 May 2017

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16 February 2016

• curprev 22:1922:19, 16 February 2016 Timneh talk contribs 117 bytes +117 Created page with "== Problem == == Solution == == See also == {{UNCO Math Contest box|year=2016|n=II|num-b=7|num-a=9}} [[Category:]]"