GMAT考题：OG2017Q-PS-43

GMAT考题

题库 / OG2017Q-PS-43

If the numbers~$\frac{17}{24}$~ ,~$\frac{1}{2}$~,~$\frac{3}{8}$~,~$\frac{3}{4}$~and ~$\frac{9}{16}$~ were ordered from greatest to least, the middle number of the resulting sequence would be

~$\frac{17}{24}$~

~$\frac{1}{2}$~

~$\frac{3}{8}$~

~$\frac{3}{4}$~

~$\frac{9}{16}$~

考题讲解

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题目分析:

先把 5 个分数排序，5 个分数的最小公倍数是 48；5 个数通分之后分别是：~$\frac{34}{48}$~,~$\frac{24}{48}$~,~$\frac{18}{48}$~,~$\frac{36}{48}$~ and ~$\frac{27}{48}$~; 从大到小排序就是：~$\frac{36}{48}$~；~$\frac{34}{48}$~；~$\frac{27}{48}$~；~$\frac{24}{48}$~；~$\frac{18}{48}$~；中位数就是~$\frac{27}{48}$~=~$\frac{9}{16}$~

综上：答案就是E.

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