1 July 2025

• curprev 14:1114:11, 1 July 2025 Sevenoptimus talk contribs m 1,264 bytes +69 Improved formatting of problem statement and solution, and slightly improved explanation in the solution

7 November 2013

• curprev 19:3519:35, 7 November 2013 Armalite46 talk contribs m 1,195 bytes 0 →Solution
• curprev 19:3519:35, 7 November 2013 Armalite46 talk contribs m 1,195 bytes +7 →Solution

3 July 2013

• curprev 20:2020:20, 3 July 2013 Nathan wailes talk contribs 1,188 bytes +15 →See also

20 February 2012

• curprev 21:5721:57, 20 February 2012 Duketip10 talk contribs 1,173 bytes 0 →Solution

22 September 2007

• curprev 21:3321:33, 22 September 2007 Azjps talk contribs m 1,173 bytes −57 →Solution: typo 5->6

9 September 2007

• curprev 15:1715:17, 9 September 2007 Azjps talk contribs m 1,230 bytes 0 →See also: wrong yr
• curprev 15:1715:17, 9 September 2007 Azjps talk contribs 1,230 bytes +870 solution
• curprev 08:1508:15, 9 September 2007 1=2 talk contribs 360 bytes +8 →Problem
• curprev 08:1208:12, 9 September 2007 1=2 talk contribs 352 bytes +352 No edit summary