Art of Problem Solving
During AMC 10A/12A testing, the AoPS Wiki is in read-only mode and no edits can be made.

2011 AMC 10B Problems/Problem 20: Revision history

Diff selection: Mark the radio buttons of the revisions to compare and hit enter or the button at the bottom.
Legend: (cur) = difference with latest revision, (prev) = difference with preceding revision, m = minor edit.

13 September 2025

16 August 2025

14 August 2025

19 June 2024

31 August 2023

5 April 2021

28 November 2020

19 November 2020

30 July 2020

31 December 2019

26 December 2018

9 August 2018

3 July 2018

16 March 2018

13 February 2018

16 February 2016

15 February 2016

25 November 2014

13 August 2014

4 July 2013

27 December 2011

9 June 2011

5 June 2011