Five students: X, Y, Z, W, and V are sitting in a row. X is to the left of Y. Z is to the right of W. V is not next to Y. Who is sitting in the middle?
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?
Five people are standing in a line: P, Q, R, S, and T. R is to the left of S but to the right of Q. T is at one end of the line. Who is standing at the other end?