7 December 2022

• curprev 17:0017:00, 7 December 2022 Mathboy100 talk contribs 2,057 bytes −68 →Solution

29 January 2021

• curprev 11:4811:48, 29 January 2021 Hamstpan38825 talk contribs 2,125 bytes +55 No edit summary

26 January 2019

• curprev 04:0004:00, 26 January 2019 Hellomath010118 talk contribs m 2,070 bytes +66 →Solution
• curprev 03:5903:59, 26 January 2019 Hellomath010118 talk contribs m 2,004 bytes +6 →Solution
• curprev 03:5703:57, 26 January 2019 Hellomath010118 talk contribs m 1,998 bytes +13 →Solution
• curprev 03:5503:55, 26 January 2019 Hellomath010118 talk contribs m 1,985 bytes −1 →Solution

12 April 2010

• curprev 00:5900:59, 12 April 2010 Bokagadha talk contribs 1,986 bytes +25 →Solution
• curprev 00:5800:58, 12 April 2010 Bokagadha talk contribs 1,961 bytes +46 →Solution

11 April 2010

• curprev 01:0801:08, 11 April 2010 Bokagadha talk contribs 1,915 bytes −13 →Solution
• curprev 01:0801:08, 11 April 2010 Bokagadha talk contribs 1,928 bytes +1,589 No edit summary

16 July 2009

• curprev 10:3810:38, 16 July 2009 Xpmath talk contribs 339 bytes +13 →Solution

15 July 2009

• curprev 18:3418:34, 15 July 2009 Xpmath talk contribs 326 bytes +326 Created page with '== Problem == Seventeen people correspond by mail with one another - each one with all the rest. In their letters only three different topics are discussed. Each pair of correspo…'