26 August 2025

• curprev 11:3911:39, 26 August 2025 Undercoverbat38 talk contribs 1,704 bytes +242 →Solution 2

12 January 2023

• curprev 23:4523:45, 12 January 2023 Craftyowl73 1 talk contribs 1,462 bytes 0 →Solution 1: Handshaking problem formula should be n(n-1)/2, rather than n(n+1)/2.

7 January 2023

• curprev 02:1402:14, 7 January 2023 Edoesmath talk contribs 1,462 bytes 0 →Solution 2

12 June 2022

• curprev 16:4216:42, 12 June 2022 Savannahsolver talk contribs 1,462 bytes +65 No edit summary

20 December 2021

• curprev 12:3912:39, 20 December 2021 Knight10 talk contribs m 1,397 bytes +14 →Solution 2

13 July 2021

• curprev 18:5518:55, 13 July 2021 Fn106068 talk contribs 1,383 bytes +14 →Solution 2
• curprev 18:5518:55, 13 July 2021 Fn106068 talk contribs 1,369 bytes +1 →Solution 2
• curprev 18:5518:55, 13 July 2021 Fn106068 talk contribs 1,368 bytes 0 →Solution 2
• curprev 18:5418:54, 13 July 2021 Fn106068 talk contribs 1,368 bytes +494 No edit summary

9 November 2020

• curprev 06:3306:33, 9 November 2020 Mt2020 talk contribs 874 bytes −1 →Solution
• curprev 06:3206:32, 9 November 2020 Mt2020 talk contribs 875 bytes +1 →Solution

25 October 2015

• curprev 23:0323:03, 25 October 2015 Moonknight123 talk contribs 874 bytes 0 →Solution

3 July 2013

• curprev 15:3615:36, 3 July 2013 Viker talk contribs m 874 bytes +15 No edit summary

9 December 2012

• curprev 11:5711:57, 9 December 2012 Mathway talk contribs 859 bytes +12 No edit summary

24 November 2012

• curprev 11:0411:04, 24 November 2012 Bharatputra talk contribs 847 bytes +395 No edit summary
• curprev 09:2709:27, 24 November 2012 Bharatputra talk contribs 452 bytes +55 No edit summary
• curprev 08:5008:50, 24 November 2012 Bharatputra talk contribs 397 bytes +397 Created page with "In the BIG N, a middle school football conference, each team plays every other team exactly once. If a total of 21 conference games were played during the 2012 season, how many t..."