17 July 2024

• curprev 17:1117:11, 17 July 2024 Thepowerful456 talk contribs m 825 bytes +1 fixed typo
• curprev 17:0717:07, 17 July 2024 Thepowerful456 talk contribs 824 bytes +379 Added solution to the problem

16 August 2023

• curprev 00:5200:52, 16 August 2023 Proloto talk contribs m 445 bytes +4 →See also

29 September 2014

• curprev 02:2702:27, 29 September 2014 Timneh talk contribs m 441 bytes +1 →Solution
• curprev 02:0702:07, 29 September 2014 Timneh talk contribs 440 bytes +440 Created page with "== Problem == If <math>f(n)=\tfrac{1}{3} n(n+1)(n+2)</math>, then <math>f(r)-f(r-1)</math> equals: <math>\text{(A) } r(r+1)\quad \text{(B) } (r+1)(r+2)\quad \text{(C) } \tfrac{..."