18 October 2025

• curprev 11:2011:20, 18 October 2025 Andrewzhong2012 talk contribs m 2,753 bytes +7 Title change

1 July 2025

• curprev 14:0214:02, 1 July 2025 Sevenoptimus talk contribs m 2,746 bytes +19 Improved formatting of problem statement and solutions

28 September 2022

• curprev 22:4922:49, 28 September 2022 Wxl18 talk contribs 2,727 bytes +15 →Solution 2

14 June 2018

• curprev 10:3310:33, 14 June 2018 Coolgeo talk contribs 2,712 bytes −15 →Solution 2
• curprev 10:3310:33, 14 June 2018 Coolgeo talk contribs 2,727 bytes +1,048 →Solution

6 January 2016

• curprev 04:2804:28, 6 January 2016 IMOJonathan talk contribs 1,679 bytes +236 No edit summary

9 November 2013

• curprev 17:4517:45, 9 November 2013 Armalite46 talk contribs 1,443 bytes +71 →Solution
• curprev 17:4117:41, 9 November 2013 Armalite46 talk contribs m 1,372 bytes +13 →Solution

3 July 2013

• curprev 20:2020:20, 3 July 2013 Nathan wailes talk contribs 1,359 bytes +15 →See Also

25 December 2007

• curprev 13:1913:19, 25 December 2007 Temperal talk contribs 1,344 bytes +22 latex
• curprev 13:1813:18, 25 December 2007 Temperal talk contribs 1,322 bytes +855 wikify

24 December 2007

• curprev 23:3423:34, 24 December 2007 Kx526627 talk contribs 467 bytes −1 →Solution
• curprev 23:3423:34, 24 December 2007 Kx526627 talk contribs 468 bytes −163 No edit summary
• curprev 23:3323:33, 24 December 2007 Kx526627 talk contribs 631 bytes −15 No edit summary
• curprev 23:3023:30, 24 December 2007 Kx526627 talk contribs 646 bytes +8 →See also
• curprev 23:2823:28, 24 December 2007 Kx526627 talk contribs 638 bytes +431 →See also

13 November 2006

• curprev 12:0312:03, 13 November 2006 JBL talk contribs m 207 bytes 0 2005 AMC 12A Problem 20 moved to 2005 AMC 12A Problems/Problem 20
• curprev 11:5811:58, 13 November 2006 JBL talk contribs m 207 bytes +134 No edit summary

30 June 2006

• curprev 16:0316:03, 30 June 2006 Matt276eagles talk contribs 73 bytes +73 No edit summary