Series – Railway Reasoning part – 10

Total Questions: 50

41. Find the missing letter/series to complete the following sequence: [RRB NTPC 04/03/2021 (Evening)]

Correct Answer: (c) R
Solution:

B + 4 = F , F + 4 = J , J + 4 = N , N + 4 = R

42. 12, 17, 27, 57, ? , 777 [RRB NTPC 04/03/2021 (Evening)]

Correct Answer: (c) 177
Solution:

43. Identify the number that does NOT belong to the following series. [RRB NTPC 05/03/2021 (Morning)]

3124, 9728, 6305, 2015

Correct Answer: (b) 2015
Solution:

Logic - 3124 , 3 × 4 = 12 (mid digit )
9728 - , 9 × 8 = 72 (mid digit )
6305 - , 6 × 5 = 30 (mid digit )
2015 don't follow this logic ,
2 × 5 = 10 ≠ 01

44. Select the combination of letters that when sequentially placed in the blanks of the given series will complete the series. [RRB NTPC 05/03/2021 (Morning)]

bbccdc _ ddedd _ efeeffgffgg _ ggh _

Correct Answer: (a) cehh
Solution:

bbccdc_ddedd_efeeffgffgg_ggh_
Correct arrangement = bbccd/ccdde/dd
eef/eeffg/ffggh/ gghh

45. 37, 52, 72, 97, 127, ? [RRB NTPC 05/03/2021 (Morning)]

Correct Answer: (d) 162
Solution:

Logic - 37 + 15 = 52
52 + 20 = 72 , 72 + 25 = 97
97 + 30 = 127 , 127 +35 = 162

46. BCA, WVX, FGE, SRT, JKI, ? [RRB NTPC 05/03/2021 (Evening)]

Correct Answer: (a) ONP
Solution:

47. ZA, BY, XC, DW, ? [RRB NTPC 07/03/2021 (Evening)]

Correct Answer: (d) VE
Solution:

ZA, BY, XC, DW, ?
Here. the letters are written with their opposite . So ? is VE.

48. 14, 41, 86, ?, 230, 329 [RRB NTPC 07/03/2021 (Evening)]

Correct Answer: (c) 149
Solution:

49. W, G, U, F, S, E, Q, D ,? ,?. [RRB NTPC 07/03/2021 (Evening)]

Correct Answer: (d) O, C
Solution:

50. 4, 6, 10, 16, 24, ?, 46, 60 [RRB NTPC 08/03/2021 (Morning)]

Correct Answer: (d) 34
Solution: