Art of Problem Solving
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2013 AMC 8 Problems/Problem 20: Revision history

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24 August 2025

16 July 2024

4 January 2024

15 April 2023

5 May 2022

1 May 2022

31 October 2021

6 October 2020

14 April 2019

28 February 2018

31 August 2016

27 November 2013

20 November 2013