Number Series Questions

In the following question, select the missing number from the given series.

15, 7.5, 7.5, ?, 22.5, 56.25

In each of the following questions a letter-series is given, in which some letters are missing. The missing letters are given in the proper sequence as one of the alternatives. Choose the correct alternatives. _ op _ mo _ n _ _ pnmop _

Choose the correct alternative that will continue the same pattern and replace the 'x' in the series 6,12,21,x,48

In the following question, select the missing number from the given series.

9, 13, 18, 24, 31, 

Which number comes next in the series?

1, 5, 2, 6, 3, 7, ?

Which one is wrong in the given series?

49 36 25 18 9 4

What will come in place of the question mark (?) in the given question?

1.5 % of 4600 + 2.8% of 2000 - 109 = ?