Civil Service Exam Reviewer · Logical Reasoning · hard
One of four clerks at the municipal hall misplaced the office logbook. When asked, each one made a statement: • Nonoy: "Elmer did it." • Vic: "I did not do it." • Elmer: "It was either me or Vic." • Dina: "I did it." Only one of them is lying. Who is responsible?
- Nonoy
- Vic
- Elmer
- Dina
Answer
C. Elmer
Solution
Test each person as the one responsible and count the true statements: if Nonoy did it, 1 statement is true; if Vic did it, 1 statement is true; if Elmer did it, 3 statements are true; if Dina did it, 2 statements are true. Only when Elmer did it is exactly one statement false, so Elmer is responsible.
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