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: • Weng: "Tess did it." • Rey: "I did not do it." • Gino: "It was either Tess or Rey." • Tess: "Gino did it." Only one of them is lying. Who is responsible?
- Weng
- Rey
- Gino
- Tess
Answer
D. Tess
Solution
Test each person as the one responsible and count the true statements: if Weng did it, 1 statement is true; if Rey did it, 1 statement is true; if Gino did it, 2 statements are true; if Tess did it, 3 statements are true. Only when Tess did it is exactly one statement false, so Tess is responsible.
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