AMC 8 2001 Problem 25

AMC8 2001 年第 25

整除与因数★★★★
Problem There are 24 four-digit whole numbers that use each of the four digits 2, 4, 5 and 7 exactly once. Only one of these four-digit numbers is a multiple of another one. Which of the following is it?
2、4、5 和 7 这四个数字每个恰好使用一次,一共可以组成 24 个四位整数。这 24 个四位整数中,只有一个是另一个的倍数。则这个数是下列哪一个?
  1. A.5724
  2. B.7245
  3. C.7254
  4. D.7425
  5. E.7542

正确答案 · Correct Answer

D

解析 · Solution

解析整理中

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