IBM英文笔试题

IBM英文笔试题
It consists of number series.In some institutes alphabetical series is  given instead of number series.Iam having number series so iam sending that.Please 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)