Civil Service Exam Reviewer · Logical Reasoning · hard
One of four barangay tanods left the gate of the barangay hall unlocked. When the captain asked, each one made a statement: • Ben: "Leo did not do it." • Leo: "I did not do it." • Vic: "I did not do it." • Carlo: "Leo did not do it." Only one of them is lying. Who is responsible?
- Ben
- Vic
- Leo
- Carlo
Answer
B. Vic
Solution
Test each person as the one responsible and count the true statements: if Ben did it, 4 statements are true; if Leo did it, 1 statement is true; if Vic did it, 3 statements are true; if Carlo did it, 4 statements are true. Only when Vic did it is exactly one statement false, so Vic is responsible.
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