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The function f is defined for each positive three-digit inte

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by BTGmoderatorAT » Tue Sep 12, 2017 5:14 am
The function f is defined for each positive three-digit integer n by f(n)=2x3y5zf(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)=9∗f(v)f(m)=9∗f(v) , then m−v=m−v= ?

(A) 8
(B) 9
(C) 18
(D) 20
(E) 80

What's the best approach to determine the answer?

OA: D
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by DavidG@VeritasPrep » Tue Sep 12, 2017 8:07 am
ardz24 wrote:The function f is defined for each positive three-digit integer n by f(n)=2x3y5zf(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)=9∗f(v)f(m)=9∗f(v) , then m−v=m−v= ?

(A) 8
(B) 9
(C) 18
(D) 20
(E) 80

What's the best approach to determine the answer?

OA: D
Would you mind reposting this one with some clearer formatting?
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