GMAT 考满分题库

Magoosh - 数学PS - 404
$$10^{x} + 10^{y} + 10^{z} = n$$, where x, y, and z are positive integers. Which of the following could be the total number of zeroes, to the left of the decimal point, contained in n?

I. x + y

II. y – z

III. z
  • AIII only
  • BI and II only
  • CI and III only
  • DII and III only
  • EI, II, and III
正确答案: E

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