CombinatoricsDifficulty 2.0JuniorFind the answerUnited Kingdom
During a particularly troublesome lesson, the following conversation occurs: Pam: "I always tell the truth." Quentin: "Pam is lying." Roger: "Both Pam and Quentin are lying." Susan: "Everyone is lying." Terry: "Everyone is telling the truth." How many people are telling the truth?
(A) 0 (B) 1 (C) 2 (D) 3 (E) 4
Want a route through all this instead of an archive? The track
puts 2,604 problems in a working order, from Junior Challenge level to the IMO shortlist.