选择题
2001 AMC 8 Problem 25: Four-Digit Multiple
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?
A.
5724
B.
7245
C.
7254
D.
7425
E.
7542