Series – Railway Reasoning part – 7

Total Questions: 50

21. Identify the number that DOES NOT belong to the following series. [RRB NTPC 12/01/2021 (Morning)]

10, 17, 26, 39, 50

Correct Answer: (b) 39
Solution:

Logic : - Here difference between two numbers is consecutive odd numbers.
10 + 7 = 17
17 + 9 = 26
26 + 11 = 37
37 + 13 = 50

22. Identify the number that does NOT belong to the following series. [RRB NTPC 12/01/2021 (Evening)]

14, 19, 26, 35, 44, 59

Correct Answer: (d) 44
Solution:

23. AZP, BYQ, CXR, ? [RRB NTPC 12/01/2021 (Evening)]

Correct Answer: (b) DWS
Solution:

24. 7, 14, 21, 28, ? [RRB NTPC 13/01/2021 (Morning)]

Correct Answer: (b) 35
Solution:

7 × 1 = 7, 7 × 2 = 14,  7 × 3 = 21, 7 × 4 = 28, 7 × 5 = 35

25. ZHC, XLF, VPL, ? [ RRB NTPC 13/01/2021 (Morning) ]

Correct Answer: (d) TTX
Solution:

26. 2, 6, 18, 54, ? [RRB NTPC 13/01/2021 (Evening)]

Correct Answer: (d) 162
Solution:

2, 6, 18, 54, ?
In the given number series the pattern is
2 × 3 = 6, 6 × 3 = 18 , 18 × 3 = 54
Similarly : 54 × 3 = 162

27. 2, 9, 28, 65, ? [RRB NTPC 13/01/2021 (Evening)]

Correct Answer: (b) 126
Solution:

28. 875, 175, 35, ? [RRB NTPC 13/01/2021 (Evening)]

Correct Answer: (d) 7
Solution:

875, 175, 35, ?
In the above number series the pattern is

29. ap, ds, gv, ? [RRB NTPC 13/01/2021 (Evening)]

Correct Answer: (a) jy
Solution:

30. The given letter clusters follow a certain pattern. Select the option that gives the correct sequence of the letters that are missing from the letter clusters. [RRB NTPC 16/01/2021 (Morning)]

DECAB/ GJFF_ / KNJJ_ / PQOM _

Correct Answer: (d) EIN
Solution:

D + 3 = G, G + 4 = K, K + 5 = P
E + 5 = J, J + 4 = N, N + 3 = Q
C + 3 = F, F + 4 = J, J + 5 = O
A + 5 = F, F + 4 = J, J + 3 = M
B + 3 = E, E + 4 = I, I + 5 = N