# 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 ?

- X
- U
- W
- T

**A. Answer: (3) 138**

**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.

**B. Answer: ****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.

**C. Answer: (1) Q8****Explanation:-**

A + 4 = E and 10^{3} = 10 x 10 x 10 = 1000

E + 4 = I and 10 – 2 = 8 = 8^{3} = 8 x 8 x 8 = 512

I + 4 = M and 8 – 2 = 6 = 6^{3} = 6 x 6 x 6 = 216

M + 4 = Q and 6 – 2 = 4 = 4^{3} = 4 x 4 x 4 = 64

and 4 – 2 = 2 = 2^{3} = 2 x 2 x 2 = 8

Thus, the answer is Q8.

**D. Answer: (4) 8****Explanation:-**

22/ 2 = 11, 30/ 3 = 10, 36/ 4 = 9, 40/5 = 8.

Thus, the answer is (4) 8.

**E. Answer:****Explanation:-**

1 + 1= 2 and A is opposite of Z, 2 + 1 = 3 and B is opposite of Y,

3 + 1 = 4 and C is opposite of X,

Thus, the answer is (1) X.