数字推理,寻求解答1.215, 124, 63 ( a ) A7 B8 C9 D152.4, 9, 8, 18, 13, ( c ) A22 B24 C36 D27

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数字推理,寻求解答1.215,124,63(a)A7B8C9D152.4,9,8,18,13,(c)A22B24C36D27数字推理,寻求解答1.215,124,63(a)A7B8C9D152.4,9

数字推理,寻求解答1.215, 124, 63 ( a ) A7 B8 C9 D152.4, 9, 8, 18, 13, ( c ) A22 B24 C36 D27
数字推理,寻求解答
1.215, 124, 63 ( a )
A7 B8 C9 D15
2.4, 9, 8, 18, 13, ( c )
A22 B24 C36 D27

数字推理,寻求解答1.215, 124, 63 ( a ) A7 B8 C9 D152.4, 9, 8, 18, 13, ( c ) A22 B24 C36 D27
215 = 216 - 1 = 6^3 - 1
124 = 125 - 1 = 5^3 - 1
63 = 64 - 1 = 4^3 - 1
26 = 27 - 1 = 3^3 - 1
7 = 8 -1 = 2^3 - 1
第一题你确定你的答案正确么?
应该第五个才是这个7吧
4+9=13
8+18=26
13+36=39
你仔细看末尾的和,都是等差数列
答案 C 36

1. 2^3-1 不过应该是3^3-1啊
2. 搞不懂