2. 外语
  3. You are given a series of numbers. Your task is to see how they form a relationship with each other. You have to choose the numb

You are given a series of numbers. Your task is to see how they form a relationship with each other. You have to choose the numb

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问题 You are given a series of numbers. Your task is to see how they form a relationship with each other. You have to choose the number that would go next in the series. 2 3 7 17 39
选项 A、58.
B、75.
C、85
D、65
答案C
解析 2+1=3，3+4=7，7+10=17，17+22=39，继而寻找1，4，10，22之间的规律。1+3=4，4+6=10，10+12=22，3，6，12之间是两倍递增关系，按规律，它们的下一个数值是 12×2=24。22+24=46，39+46=85，故选项C为正确答案。
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本试题收录于： A类竞赛（研究生）题库大学生英语竞赛（NECCS）分类
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