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Home › Verbal Reasoning › Coding-Decoding

Coding-Decoding — Verbal Reasoning Questions & Practice

Practise 507 Coding-Decoding questions from Verbal Reasoning for competitive exams such as UPSC, Banking, SSC and Railway. Read the worked questions below, check every answer with an explanation, and track what you get wrong.

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Practice questions on Coding-Decoding — with answers

Try each question first, then open the answer. Explanations are included.

1. In a certain code language, 'MONKEY' is written as 'XDJMNL'. How will 'TIGER' be written in that code language?

  1. AQDFHS
  2. BSDFHS
  3. CSHFDQ
  4. DQDFRH
Show answer

Answer: A

Logic: The word is reversed and each letter is decreased by 1 (-1). MONKEY reversed -> YEKNOM -> Y-1=X, E-1=D, K-1=J, N-1=M, O-1=N, M-1=L -> XDJMNL. Applying to TIGER: reversed -> REGIT -> R-1=Q, E-1=D, G-1=F, I-1=H, T-1=S -> QDFHS.

2. If 'COMPUTER' is coded as 'RFUVQNPC', then how will 'MEDICINE' be coded in that language?

  1. AEOJDJEFM
  2. BEOJDEJFM
  3. CMFEJDJOE
  4. DEOJDJMFM
Show answer

Answer: A

Logic: Reverse order with first and last letter swapped, and middle letters shifted by +1. MEDICINE -> M and E remain at ends, middle letters EDICIN reversed -> NICIDE +1 -> OJDJEF -> EOJDJEFM.

3. In a certain code, 'LIGHT' is coded as 'MJHIU'. How is 'FLAME' coded in that language?

  1. AGMBNF
  2. BGNCNE
  3. CGMBME
  4. DHNCNE
Show answer

Answer: A

Logic: Each letter is shifted forward by +1 (+1 to all letters). F+1=G, L+1=M, A+1=B, M+1=N, E+1=F => GMBNF.

4. If 'DELHI' is coded as 73541 and 'CALCUTTA' as 82589662, how is 'CALICUT' coded?

  1. A8251896
  2. B8251869
  3. C8521896
  4. D8251986
Show answer

Answer: A

Logic: Direct letter-to-number substitution code. C=8, A=2, L=5, I=1, C=8, U=9, T=6 => 8251896.

5. If 'RED' is coded as 27 and 'BLUE' as 40, how will 'GREEN' be coded?

  1. A49
  2. B54
  3. C50
  4. D44
Show answer

Answer: A

Logic: Sum of numerical positions of letters. R(18)+E(5)+D(4) = 27. B(2)+L(12)+U(21)+E(5) = 40. G(7)+R(18)+E(5)+E(5)+N(14) = 49.

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