# Complete the following series:

A. 7, 15, 32, 67
1.  137
2.  136
3.  138
4.  140

B. 7, 9, 13, 21, 37, ?
1.  67
2.  69
3.  168
4.  65

C. A 1000,  E 512, I 216, M 64, ?
1. Q 8
2. Q 18
3.  S 88
4.  P 8

D. 22, 2, 11, 30, 3, 10, 36, 4, 9, 40, 5, ?
1. 7
2. 3
3. 4
4. 8

E. 1 A 2 Z 3 B 4 Y 5 C 6 ?

1. X
2. U
3. W
4. T

Explanation:-
7 + 8 = 15,            15 + 2 x 8 + 1 = 15 + 17 = 32,                         32 + 2 x 17 + 1 = 32 + 35 = 67,                       67 + 2 x 35 + 1 =  67 + 71 = 138.
Thus, the next number is 138.

Explanation:-
7 + 2 = 9,             9 + 2 x 2 = 9 + 4 = 13,                   13 + 2 x 4 = 13 + 8 = 21,               21 + 2 x 8 = 21 + 16 = 37,                 37 + 2 x 16 = 37 + 32 = 69.
Thus, the answer is (2) 69.

Explanation:-
A + 4 = E     and 103 = 10 x 10 x 10 = 1000
E + 4 = I       and  10 – 2 = 8 = 83 = 8 x 8 x 8 = 512
I + 4 = M      and  8 – 2 = 6  =  63 = 6 x 6 x 6 = 216
M + 4 = Q     and  6 – 2 = 4 = 43 = 4 x 4 x 4 = 64
and 4 – 2 = 2 = 23 = 2 x 2 x 2 = 8