why we are dividing by 2?? pl tel me and also tel me some easy tricks for h c m and l c m
(Sun, Dec 26, 2010 06:13:40 AM)
whenever dividend is unknown,it is an LCM question
so firstly find the LCM of 12,18,21,30
we get 1260,and this is exactly divisible by 12,18,21,30
as we have asked after doubling the number,it is exactly divisible by the given numbers.
so,1260/2 is done,we get 630
and 630*2=1260,which is asked to us
(Mon, Dec 27, 2010 01:51:19 AM)
Thanks Aparna, it is really helpful
(Tue, Jun 14, 2011 11:07:27 PM)
How 1260/2 comes?
(Mon, Jul 18, 2011 11:51:45 AM)
1260/2 come ,because in Q it ask to find least no.(630) which when double to divisible by given no.(12,18,21,30)