Five friends P, Q, R, S, and T are sitting in a row. P is to the left of Q but to the right of R. S is to the right of T. Who is sitting in the middle?
In a family, there are three siblings: X, Y, and Z. X is older than Y but younger than Z. If Z is a doctor and Y is a teacher, what is X's profession if he is not a student?
In a race, five runners A, B, C, D, and E finish in the following order: A finishes before B but after C. D finishes before E but after B. What is the correct order of finishers?