Art of Problem Solving
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2020 AIME I Problems/Problem 13: Revision history

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27 September 2025

31 August 2025

24 July 2025

27 May 2025

3 August 2024

29 October 2023

30 January 2023

31 August 2022

17 June 2022

8 June 2022

6 June 2022

6 February 2022

29 January 2022

25 February 2021

31 January 2021

5 January 2021

5 December 2020

5 June 2020

2 June 2020

1 June 2020

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