Art of Problem Solving
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2021 AIME II Problems/Problem 13: Revision history

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25 October 2025

28 June 2025

17 February 2025

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26 January 2024

4 February 2023

3 February 2023

21 November 2022

30 August 2022

21 June 2022

10 June 2022

30 May 2022

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8 September 2021

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31 July 2021

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