Check this post out on some approaches in delaing wiht remainder questions:
https://www.beatthegmat.com/understandin ... 33535.html
For this problem:
To find : N/6 the remainder or basically is N divisible by 6 then we know the remiander is 0 or what are the possible values of N and does the remainder when divided by 6 stays the same(i.e w eneed to find one single remiander value)
Stmt I
N is a multiple of 5 can be expressed algenrically as N = 5*K
where K is an integer.
if k=0 n=0 remainder is 0
if k=1 n=5 reminder when n divided by 6 is 5
INSUFF (since we many different remainder values are possible)
Stmt II
N = 12K
Since 12 is divisible by 6 with a remainder 0 we know N is definitely divisble by 6 so the remainder is always going to be 0
SUFF
Choose
B
Hope this helps!
Regards,
CR
