MontrealLady 2 28 Mar 2010, 07:00 13 If n is a positive integer and n^2 is divisible by 72, then asyahamed 9 18 Feb 2010, 01:34 PS- Need short cut selvae 2 16 Mar 2009, 05:53 1 Short cut for this question ritula 3 20 Jan 2009, 09:30 Is there any short cut for approaching this problem???