Art of Problem Solving

2020 AMC 10B Problems/Problem 19: Revision history

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Legend: (cur) = difference with latest revision, (prev) = difference with preceding revision, m = minor edit.

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10 November 2025

27 October 2025

4 December 2024

20 October 2024

22 October 2023

7 October 2023

8 June 2023

8 November 2022

5 July 2022

10 April 2022

7 November 2021

7 April 2021

29 December 2020

28 December 2020

27 December 2020

28 June 2020

22 May 2020

8 February 2020

7 February 2020

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