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vinayreguri
- Junior | Next Rank: 30 Posts
- Posts: 29
- Joined: Sat May 07, 2011 6:16 am
Hi,
From(1) :
if a=3, b=6...HCF is 3
if a=6, b=12..HCF is 6
Insufficient
From(2):
if a=2,b=5 then HCF is 1
if a=3,b=6 then HCF is 3
Insufficient
Both(1)&(2):
a and b are 3n and 3(n+1) in any order.
As n and (n+1) are co-primes..i.e. HCF is 1, HCF of 3n and3(n+1) is 3*1 = 3
Sufficient
Hence, C
