1,2,5,14,( )
A.30
B.31
C.41
D.61
0,8,54,192,500,( )
A.840
B.960
C.1080
D.1280
A.206
B.218
C.239
D.251
A.149
B.167
C.181
D.199
1.答案: A
解析:
2.答案: C
3.答案: C
故正确答案为C。
4.答案: D
解析: 前项加后项的3倍。
5.答案: C
两两做差,得到公差为11的等差数列:12,23,34,,45,(56),故所求项为125+56=181.