alphabetical and number series questions for rrb



Question 1:

15, 43, 83, 137, 207, ?

Options-

1. 295

2. 304

3. 259

4. 502

Answer:

295

Solution:

Logic is:

43-15=28

83-43=40

137-83=54

207-137=70

Now, 40-28=12

54-40=14

70-54=16

So difference of difference is in the form-:12, 14, 16,……

So, missing number=207+70+18=295

Question 2:

4, 13, 41, 126, 382, ?

Options-

1. 1196

2. 1151

3. 1362

4. 1147

Answer:

1151

Solution:

Logic is:

4×3+1=13

13×3+2=41

41×3+3=126

126×3+4=382

382×3+5=1151

Question 3:

BRV, FVZ, JZD, ?

Options-

1. BLP

2. SRE

3. NDH

4. WQA

Answer:

NDH

Solution:

Logic is:


Question 4:

A7F, E15J, I23N, ?

Options-

1. P29O

2. L41P

3. M31R

4. Q38T

Answer:

M31R

Solution:

Logic is:


Question 5:

43, 45, 42, 46, 41, 47, ?

Options-

1. 50

2. 58

3. 40

4. 65

Answer:

40

Solution:

Logic is:

Given series consists of two series.

Complete series is:

43, 45, 42, 46, 41, 47, 40

Series 1: 43, 42, 41, 40

Logic:

43-1=42

42-1=41

41-1=40

Series 2: 45, 46, 47

Logic:

45+1=46

46+1=47

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