Prime numbers

the problem statement tells us that n/5 = I. it also tells us that n=p^2*q. therefore either p or q MUST be a multiple of 5.


only choice B - p^2 * q^2 gives us the affirmative that we will have 2 fives to cancel out the 25.

Kindly search GMAT prep question on Google. Just type the question followed by ",gmat".

You will get a links to solutions at MGMAT forum,BTG, URCH and gmat club. read all solutions/approaches.

Hi,
I think OA should be (b).

can you please elobrate.
wehn googgling, i am getting the result of the this page ONLY.

it woudl be really felpful if you could provide the link or post the elobrate solution.

https://www.lmgtfy.com/?q=If+n+is+a+mult ... +5%2C+gmat


the first link is BTG
the second is MGMAT,
the 3rd is urch
4th is gmat club, need I say more ?


That should be enough to clear any doubts on any question, follow same procedure for ALL gmat prep stuff - until u have something really new to discuss.

let p=5 and q=3 meaning n=75 or p=3 and q=5 meaning n=45.
in both the cases n is multiple for 5.

like wise for n to be divisible by 25,meaning n/25 = Integer.

n= 25I. So,check for p=5,q=3 and vice versa for all the options.
Only B will provide multiple of 25 in all cases.
Hence B it is.