GMAT 考满分题库

- 数学PS -
If x, y, and z are positive integers such that x is a factor of y, and x is a multiple of z, which of the following is NOT necessarily an integer?
  • A\frac{x + z}{z}
  • B\frac{y + z}{x}
  • C\frac{x + y}{z}
  • D\frac{xy}{z}
  • E\frac{yz}{x}
显示答案
正确答案: B

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