Series – Railway Reasoning part – 12

Total Questions: 50

1. 2K5, 4M7, ? [RRB NTPC 21/03/2021 (Morning)]

Correct Answer: (d) 6O9
Solution:

2 + 2 = 4 , 4 + 2 = 6
K + 2 = M , M + 2 = O
5 + 2 = 7 , 7 + 2 = 9

2. ACE, XZB, ? [RRB NTPC 21/03/2021 (Morning)]

Correct Answer: (c) UWY
Solution:

logic- A - 3 = X , X - 3 = U
C - 3 = Z , Z - 3 = W
E - 3 = B , B - 3 = Y

3. A1B, C3D, ? [RRB NTPC 21/03/2021 (Morning)]

Correct Answer: (d) E5F
Solution:

logic- A + 2 = C , C + 2 = E
1 + 2 = 3 , 3 + 2 = 5
B + 2 = D , D + 2 =F

4. Select the combination of letters that when sequentially placed in the blanks of the given series will complete the series. [RRB NTPC 21/03/2021 (Evening)]

xy _ xx _ yzzxx _ yyy _ zzxxxx

Correct Answer: (d) zyxz
Solution:

xyz/xxyyzz/xxxyyyzzz/xxxx

5. 3, 54, 6, 50, 9, 46, 12, 42, ? ,? [RRB NTPC 21/03/2021 (Evening)]

Correct Answer: (a) 15, 38
Solution:

6. A, C, F, K, ? [RRB NTPC 27/03/2021 (Morning)]

Correct Answer: (c) T
Solution:

7. AB, EFG, KLMN, ? , CDEFGH [RRB NTPC 27/03/2021 (Evening)]

Correct Answer: (c) STUVW
Solution:

8. 11, 14, 17, 24, 31, 34, 37, 44, ? [RRB NTPC 27/03/2021 (Evening)]

Correct Answer: (b) 51
Solution:

11 + 3 = 14 , 14 + 3 = 17 , 17 + 7 = 24 , 24 + 7 = 31
31+ 3 = 34 , 34 + 3 = 37 , 37 + 7 = 44 , 44 + 7 = 51

9. 7, 9, 13, 21, ? [RRB NTPC 01/04/2021 (Morning)]

Correct Answer: (d) 37
Solution:

10. CHD, EJF, ? [RRB NTPC 01/04/2021 (Morning)]

Correct Answer: (a) GLH
Solution: