Which number should come next in this series? 25, 24, 22, 19, 15, ?

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问题 Which number should come next in this series? 25, 24, 22, 19, 15, ?

选项

答案10

解析 (分析可知：数列中前后两个数字之差递增，分别为1，2，3，4，那么下一个差应为5，因此15应减5，即10。)

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