單項選擇題1,8,9,4,( ),1/6
A.3
B.2
C.1
D.1/3
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1.單項選擇題1,5,14,30,55,( )
A.91
B.74
C.75
D.125
2.單項選擇題17,18,22,31,47,( )
A.54
B.63
C.72
D.81
3.單項選擇題-26,-6,2,4,6,( )
A.11
B.12
C.13
D.14
4.單項選擇題1,2,6,24,( )
A.56
B.120
C.96
D.72
5.單項選擇題16,17,36,111,448,( )
A.2472
B.2245
C.1863
D.1679