If x, y, and z are positive integers, and 4x=5y=6z, then the least possible value of x+y+z is

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问题 If x, y, and z are positive integers, and 4x=5y=6z, then the least possible value of x+y+z is

选项 A、15
B、28
C、37
D、42
E、60

答案C

解析 The least common multiple of 4, 5, and 6 is 60, so the numbers are x=15; y=12; z=10; 15+12+10=37.

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