Continue the following number series with the group of numbers below which best continues the series? 1 10 3 9 5 8 7

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问题 Continue the following number series with the group of numbers below which best continues the series? 1   10   3   9   5   8   7   7   9   6   ?   ?

选项

答案11,5.

解析 (单数数字是从1开始的奇数,所以接下来是11,双数数字是从10向前倒数,所以下一个是5。)  
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