Art of Problem Solving
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2000 AMC 12 Problems/Problem 21: Revision history

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25 August 2025

13 May 2024

28 October 2022

16 October 2022

21 February 2022

8 November 2021

24 October 2021

23 June 2021

19 January 2021

1 January 2021

30 December 2020

20 October 2020

19 October 2020

27 July 2020

5 June 2020

20 August 2019

30 June 2019

29 June 2019

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