16 August 2011

• 03:5203:52, 16 August 2011 diff hist +215 N 2005 IMO Shortlist Problems/N1 Created page with "Consider the sequence <math>a_1,a_2, . . .</math> defined by <math>a_n=2^n+6^n+3^n-1</math> for <math>n = 1,2, . . . </math>. Determine all positive integers that are relatively..." current
• 03:3603:36, 16 August 2011 diff hist +182 N 2004 IMO Shortlist Problems/N5 Created page with "We call a positive integer alternate if its decimal digits are alternately odd and even. Find all positive integers <math>n</math> such that <math>n</math> has an alternate multi..." current
• 03:2703:27, 16 August 2011 diff hist +277 N 1998 IMO Shortlist Problems/N6 Created page with "For any positive integer <math>n</math>, let <math>d(n)</math> denote the number of positive divisors of <math>n</math> (including <math>1</math> and <math>n</math>). Determine a..." current
• 03:2003:20, 16 August 2011 diff hist +835 1998 IMO Shortlist Problems/N1 →Problem current
• 03:0903:09, 16 August 2011 diff hist +112 N 1998 IMO Shortlist Problems/N1 Created page with "== Problem == Find all pairs of positive integers <math>(a,b)</math> such that, <cmath>ab^2+b+7|a^2b+a+b</cmath>"
• 02:4302:43, 16 August 2011 diff hist −4 2001 IMO Shortlist Problems/N6 →Solution
• 02:1902:19, 16 August 2011 diff hist +1,463 2001 IMO Shortlist Problems/N6 →Solution