Civil Services Prep

Prelims 2022 · CSAT / Logical Reasoning · Question 16

If the order of the letters in the English alphabet is reversed and each letter represents the letter whose position it occupies, then which one of the following represents 'LUCKNOW'?

  1. OGXPMLD
  2. OGXQMLE
  3. OFXPMLE
  4. OFXPMLD

Answer

OFXPMLD

Key fact: In reversed alphabet coding, each letter maps as A↔Z, B↔Y, C↔X ... L↔O, U↔F, C↔X, K↔P, N↔M, O↔L, W↔D. So LUCKNOW → OFXPMLD.

  • (a) OGXPMLD: Second letter should be F for U, not G. Incorrect.
  • (b) OGXQMLE: Multiple mismatches; U→F, K→P, W→D. Incorrect.
  • (c) OFXPMLE: Last letter should be D for W, not E. Incorrect.
  • (d) OFXPMLD: Matches all reversed-alphabet mappings exactly. Correct.
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