CAT · Binary Logic / Truth-Tellers · Quiz
5 real CAT questions on Binary Logic / Truth-Tellers. Instant scoring and solutions, no signup — see where you stand in ~3 minutes.
Question 1 of 3
HARDIn a group of four people—P, Q, R, and S—each person is either a truth-teller (always tells the truth) or a liar (always lies). P says, 'Q is a liar.' Q says, 'R and S are both liars.' R says, 'P is a truth-teller.' S says, 'Q is a truth-teller.' How many of them are truth-tellers?