18 October 2025

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17 September 2025

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15 July 2024

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7 August 2023

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12 November 2022

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27 April 2021

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1 January 2018

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4 July 2013

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1 January 2013

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16 March 2011

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• curprev 12:2512:25, 16 March 2011 Pidigits125 talk contribs 220 bytes −1,846 →Problem
• curprev 12:2212:22, 16 March 2011 Pidigits125 talk contribs 2,066 bytes +2,066 Created page with '== Problem == How many of the twelve pentominoes pictured below have at least one line of symettry? <math> \textbf{(A)}\ 3 \qquad \textbf{(B)}\ 4 \qquad \textbf{(C)}\ 5 \qquad …'