请帮忙我做几道考公务员的数列题

1. 24,70,208,( )
A.140 B.416 C.622 D.278
解:A*3-2=B
24*3-2=70
70*3-2=208
208*3-2=622

2. 0,1,3,8,21,( )
A.42 B.29 C.55 D.63
解:3B-A=C
3*1-0
3*3-1
3*8-3
3*21-8

3. 7,9,40,74,1526,( )
A,1600 B.5436 C.1640 D.3052
解:2A-B=C
7^2-9=40
9^2-7=74
40^2-74=1526
74^2-40=5436

4.8,12,24,60,( )
A.168 B.84 C.120 D.128
解:B/A=...
12/8＝1.5
24/12＝2
60/24＝2.5
180/60＝3

5.10,26,65, ( )
A.122 B.145 C.170 D.197
解:9+1,25+1,64+1,144+1

6. 2,15,7,40,77, ( )
A.96 B.126 C.138 D.156
解:多了个7
2+13*1-0=15 15+13*2-1=40 40+13*3-2=77 77+13*4-3=126

7.-1,4,21,56,115, ( )
A.146 B.178 C.195 D.204
解:
1=1^3-2
4=2^3-4
21=3^3-6
56=4^3-8
115=5^3-10
204=6^3-12

8.2, 30 , 130, 350, ( )
A.729 B.738 C.1029 D.1225
解1,3,5,7,9的立方加上1，3，5，7，9，

楼上的答案有点太过自我了。完全凭