Four friends - A, B, C, and D - have different pets: a dog, a cat, a bird, and a fish. A does not have a cat. B has a pet that is not a bird. C has a dog. What pet does D have?
In a family of six members A, B, C, D, E, and F, A is the father of B. C is the mother of B. D is the brother of B. E is the sister of B. F is the grandfather of B. Who is the grandmother of B?
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?