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