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 five members - P, Q, R, S, and T - P is the father of Q. R is the mother of Q. S is the sister of Q. T is the brother of R. Who is the grandmother of Q?
Five people - A, B, C, D, and E - are sitting in a row. A is to the left of B. C is to the right of D. E is not next to A. Who is sitting in the middle?
There are three boxes: one contains apples, one contains oranges, and one contains both. The boxes are labeled incorrectly. If you can only open one box and take one fruit, which box should you open to correctly label all the boxes?