题目信息
The function f is defined for each positive three-digit integer n by $$f(n) = 2^{x}3^{y}5^{z}$$, 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 $$f(m) = 9f(v)$$, then $$m - v$$ =
A:8
B:9
C:18
D:20
E:80
参考答案及共享解析

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正确答案:
D:20
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