数字推理问题!高手来6448362781/4()A.97/6B.123/28C.179/12D.243/1623101526()A.32B.35C.38D.4218204279()A.126B.128C.132D.136

Question

数字推理问题! 高手来
64 48 36 27 81/4 ( )
A.97/6 B.123/28 C.179/12 D.243/16
2 3 10 15 26( )
A.32 B.35 C.38 D.42
1 8 20 42 79( )
A. 126 B.128 C.132 D.136

Answer 1

1.64 48 36 27 81/4 ( )
A.97/6 B.123/28 C.179/12 D.243/16
一个等比数列,公比3/4,所以选D
2.2 3 10 15 26( )
A.32 B.35 C.38 D.42
2=1^2+1 (1^2表示1的平方,以下类同)
3=2^2-1
10=3^2+1
15=4^2-1
26=5^2+1
35=6^2-1
故选B
3.1 8 20 42 79( )
A.126 B.128 C.132 D.136
相邻两项做差的：7,12,22,37,57
然后再做差的：5 10 15 20
即二级等差故选D