function Problem

[gmat009]

2. The function f is defined for each positive three-digit integer n by f(n) = 2x3y5z , where x, y and z are the hundreds, tens, and units digits of n, respectively. If m and v are three-digit positive integers such that f(m)=9f(v), them m-v=?
(A)8
(B)9
(C)18
(D)20
(E)80

[schumi_gmat]

Hey gmat009,

Please post the OA so that it is easier to try

[vishubn]

oa is D

I have the same some issue solving this as well ??

Any thoguhts

[stop@800]

You are changing the 10th digit by 3^2
so 10*2 will give u 20

I solved it sometime back also.
You will find detailed explanation in past posts.

[mental]

can anyone post the link to solution