1.5,12,21,34,53,80,( )
A.115 B.117 C.119 D.121
2..1,4,11,30,85,( )
A.248 B.250 C.256 D.260
3..187,259,448,583,754,( )
A.847 B.862 C.915 D.944.
4..2,2,0,7,9,9,( )
A.13 B.15 C.18 D.20
5..1,2,8,28,100,( )
A.196 B.248 C.324 D.356
參考答案解析