A family consists of a father, a mother, and two children. The father is a chef, the mother is a nurse, and one child is a student. If the other child is not a student, what can be inferred about their profession?
A family consists of a grandfather, a father, a mother, and two children. The grandfather's only son is the father. The mother is the wife of the father. How many generations are there in this family?
In a family, there are four members: P, Q, R, and S. P is the grandfather of R. Q is the daughter of P. S is the son of Q. What is the relationship between R and S?