21,27,40,61,94,148,()。
A.239
B.242
C.246
D.252
2023-05-27
参考答案:A
相邻两数依次做差得到新的一组数字6,13,21,33,54,如此继续又得到7,8,12,21, 接下来是1,4,9,这时规律就明显了,分别写为12,22,32,则下一个数是42,即16。故所求数字为16 + 21+54+148 = 239。
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2023-05-27
相邻两数依次做差得到新的一组数字6,13,21,33,54,如此继续又得到7,8,12,21, 接下来是1,4,9,这时规律就明显了,分别写为12,22,32,则下一个数是42,即16。故所求数字为16 + 21+54+148 = 239。
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