29 October 2024

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25 April 2021

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22 March 2019

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5 May 2017

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4 November 2016

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25 October 2016

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5 July 2013

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24 December 2012

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21 November 2011

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6 September 2011

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• curprev 21:3321:33, 6 September 2011 Math Kirby talk contribs 812 bytes +812 Created page with "== Problem == How many two-digit numbers have digits whose sum is a perfect square? <math> \textbf{(A)}\ 13\qquad\textbf{(B)}\ 16\qquad\textbf{(C)}\ 17\qquad\textbf{(D)}\ 18\qq..."