IBM英文笔试题

IBM英文笔试题
It consists of number some institutes alphabetical series is  given instead of number having number series so iam sending se go through tha alphabetical tests also.
1.  30,28,25,20,34,28,?
a:21
2  4,8,16,32,64,128,?
a:256
3.  8,16,24,32,40,48,?
a:56
4.  13,11,14,12,15,13,?
a:16
5.  6,18,36,108,216,648,?
a:1296
6  4,4,8,8,16,16,?
a:32
7.  2,6,18,54,162,486,?
a:1458
8  4,20,35,49,62,74,?
a:85
9.  10,18,15,23,20,28,?
a:25
10 . 4,10,8,14,12,18,?
a:16
11 .10,15,12,17,14,10,?
a:16
part 2
consists of non-verbal reasoning (figures). So it is impossible for  me to send those.(25 questions)
part 3 (quantitative)