Series – Railway Reasoning part – 10

Total Questions: 50

31. B4D, C9I, D16P, ? [RRB NTPC 02/03/2021 (Evening)]

Correct Answer: (d) E25Y
Solution:

B + 1 = C, C + 1 = D, D + 1 = E
D + 5 = I, I + 7 = P, P + 9 =Y
Numbers are squares of consecutive numbers.
Next term will be = E25Y

32. 3, 4, 7, 12, 19, 28, ? [RRB NTPC 03/03/2021 (Morning)]

Correct Answer: (a) 39
Solution:

Logic :-
3 + 1 = 4 ,4 + 3 = 7,7 + 5 = 12, 12 + 7 = 19, 19 + 9 = 28,28 + 11 = 39

33. D4U, G9R, J16O, ? [RRB NTPC 03/03/2021 (Morning)]

Correct Answer: (a) M25L
Solution:

D + 3 = G, G + 3 = J, J + 3 = M
U - 3 = R, R - 3 = O, O - 3 = L
2² = 4, 3² = 9, 4² = 16, 5² = 25
Next term = M25L

34. 117, 118, 120, 129, 193, ? [RRB NTPC 03/03/2021 (Evening)]

Correct Answer: (b) 818
Solution:

117 + 1⁰ = 118
118 + 2¹ = 120
120 + 3² = 129
129 + 4³ = 193
193 + 5⁴ = 818

35. 1Z, 3X, 5V, ? [RRB NTPC 03/03/2021 (Evening)]

Correct Answer: (d) 7T
Solution:

Logic -
Odd number series 1, 3, 5, 7
Z - 2 = X , X - 2 = V , V - 2 = T

36. DW, FU, HS, ? [RRB NTPC 03/03/2021 (Evening)]

Correct Answer: (a) JQ
Solution:

Logic -
D + 2 = F , F + 2 = H , H + 2 = J
W - 2 = U , U - 2 = S , S - 2 = Q

37. A3A, Y8E, ?, O33M, G53Q [RRB NTPC 03/03/2021 (Evening)]

Correct Answer: (d) U18I
Solution:

Logic :- 3 + 5 = 8, 8 + 10=18, 18 + 15 = 33, 33 + 20 = 53
Missing term should have 18 as a number.

38. OQS, ?, ACE, GIK, MOQ [RRB NTPC 04/03/2021 (Morning)]

Correct Answer: (b) UWY
Solution:

39. 47,194, ? ,782,1223,1762 [RRB NTPC 04/03/2021 (Morning)]

Correct Answer: (c) 439
Solution:

7² − 2 = 47
14² − 2 = 194
21² − 2 = 489
28² − 2 = 782
35² − 2 = 1223
42² − 2 = 1762

40. mc, hx, cs, xn, si, ? [RRB NTPC 04/03/2021 (Evening)]

Correct Answer: (b) nd
Solution: