19, 34, 39, 44, ?, 30

Find out the missing number in the following number series.

1) 19, 34, 39, 44, ?, 30

A.49

B.52

C.22

D.35

E.28

Sol:

19 * 1 = 19

17 * 2 = 34

13 * 3 = 39

11 * 4 = 44

7 * 5 = 35

5 * 6 = 30