In a family, there are three siblings: X, Y, and Z. X is older than Y but younger than Z. Y is a painter, and Z is a doctor. What is X's profession if it is known that all siblings have different professions?
In a family, there are four members: M, N, O, and P. M is the grandmother of O, N is the father of O, and P is the sister of N. If O is a student, what is M's relationship to P?
A, B, C, D, and E are five students who scored the following marks: A scored more than B but less than C. D scored less than E but more than A. Who scored the least?