Alpha-Numeric Sequence puzzles

Logical Reasoning Questions based on Alpha-Numeric Sequence puzzles can be tried upon in this question and answers. Attempt all of them to know if you understand it's basic concept.This section is very useful for those who are preparing for competitive exams such as Written test of Bank Exams, CAT Exams, Railway Exams, SSC, UPSC,Banking,Insurance, Defence and many more.

• Q15.Directions: What should come in the place of question mark (?) in the following alpha - numeric series?
  2Z5, 7X7, 14V9, 23T11, 34R13, ?

  A) 27U24
  B) 47U15
  C) 47P15
  D) 47V14
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• Q16.Directions: What should come in the place of question mark (?) in the following alpha - numeric series?X49W64, R81Q100, C121B144, ?

  A) N169M196
  B) N160M190
  C) N164M194
  D) U36T46
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• Q17.Directions: What should come in the place of question mark (?) in the following alpha - numeric series?
  31 M 97, 37 P 89, 41 S 83, ?, 47 Y 73

  A) 43 V 79
  B) 45 V 80
  C) 43 V 81
  D) 44 Y 82
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• Q18.Directions: What should come in the place of question mark (?) in the following alpha - numeric series?
  71 XW 13, 67 UT 17, ?, 59 ON 23

  A) 65 RQ 18
  B) 63 RQ 19
  C) 61 RQ 19
  D) 60 RQ 126
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• Q19.Directions: What should come in the place of question mark (?) in the following alpha - numeric series?
  C6, F3, I9, ?, O3

  A) L6
  B) Q3
  C) R9
  D) T6
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• Q20.Directions: What should come in the place of question mark (?) in the following alpha - numeric series?
  C-8, H-12, M-16, ? , W-24

  A) Q-18
  B) P-19
  C) R-20
  D) O-20
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• Q21.O1F, R2H, U6J, X21L , ?

  A) B80M
  B) D78O
  C) A88N
  D) C82Q
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