In a group of friends - M, N, O, P, and Q - each has a different favorite color: red, blue, green, yellow, and orange. M likes blue. N does not like red or green. O likes yellow. What color does P like?
In a group of five friends: Alice, Bob, Charlie, David, and Eva, the following conditions apply: 1) Alice cannot sit next to Bob. 2) Charlie must sit next to David. 3) Eva can sit anywhere. Which of the following arrangements is valid?
In a family of five members - P, Q, R, S, and T - there are two males and three females. P is a teacher, Q is a doctor, and R is a male. S is not a teacher. Who is the doctor?