Four friends, A, B, C, and D, have different pets: a dog, a cat, a bird, and a fish. A does not have the dog or the bird. B has a cat. C has a fish. Who has the dog?
In a family of six members P, Q, R, S, T, and U, there are two males and four females. P is a teacher, Q is a doctor, R is the son of P, S is the daughter of Q, and T is the sister of R. Who is U?
In a group of five people, A, B, C, D, and E, each has a different favorite color: red, blue, green, yellow, and black. A does not like red or blue. B likes yellow. C likes green. What color does D like?