18 October 2024

• curprev 07:0607:06, 18 October 2024 Joeylllll talk contribs 3,916 bytes +453 No edit summary

22 January 2023

• curprev 10:1010:10, 22 January 2023 Kevinchen yay talk contribs 3,463 bytes −1,900 →Solution
• curprev 10:0610:06, 22 January 2023 Kevinchen yay talk contribs 5,363 bytes +1,900 →Solution

28 December 2022

• curprev 21:4921:49, 28 December 2022 Crankyjoke talk contribs 3,463 bytes +189 →Note

1 October 2020

• curprev 22:5322:53, 1 October 2020 Phoenixfire talk contribs 3,274 bytes +4 →Problem

2 January 2020

• curprev 14:0314:03, 2 January 2020 Mvp harry talk contribs 3,270 bytes +1 →Note
• curprev 14:0214:02, 2 January 2020 Mvp harry talk contribs 3,269 bytes −3 →Note
• curprev 14:0014:00, 2 January 2020 Mvp harry talk contribs 3,272 bytes +5 →Note
• curprev 13:5813:58, 2 January 2020 Mvp harry talk contribs 3,267 bytes +976 →Solution

27 August 2017

• curprev 09:1309:13, 27 August 2017 Xiej talk contribs 2,291 bytes +139 Replaced image with Asymptote diagram

4 July 2013

• curprev 22:3322:33, 4 July 2013 Nathan wailes talk contribs 2,152 bytes +15 No edit summary

12 December 2011

• curprev 22:1722:17, 12 December 2011 Baijiangchen talk contribs m 2,137 bytes +8 →Solution
• curprev 22:1622:16, 12 December 2011 Baijiangchen talk contribs 2,129 bytes +160 →Solution

5 April 2007

• curprev 09:1809:18, 5 April 2007 Azjps talk contribs m 1,969 bytes −3 →Solution: correct typos, rmv {{soln}}

31 March 2007

• curprev 21:5021:50, 31 March 2007 Robinhe talk contribs 1,972 bytes −13 →Solution

30 March 2007

• curprev 17:1517:15, 30 March 2007 Azjps talk contribs m 1,985 bytes +172 →Solution: +
• curprev 17:1117:11, 30 March 2007 Azjps talk contribs 1,813 bytes +1,813 add poorly explained solution