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UPSC Prelims 2025 CSAT, question 57

Topic: Logical reasoning

Q57

If FRANCE is coded as 654321 and GERMANY is coded as 9158437, then how is YEMEN coded ?

  1. (a) 54321
  2. (b) 81913
  3. (c) 71913
  4. (d) 71813Correct answer

Solution.

Answer: (d) 71813

  1. From FRANCE=654321\text{FRANCE} = 654321 and GERMANY=9158437\text{GERMANY} = 9158437, each letter maps consistently to a single digit: Y=7,E=1,M=8,N=3\text{Y} = 7, \text{E} = 1, \text{M} = 8, \text{N} = 3.
  2. Substituting these digits for Y-E-M-E-N\text{Y-E-M-E-N} gives 7181371813.