In a family of five members: P, Q, R, S, and T, there are two males and three females. P is a teacher. Q is R's sister. S is a doctor. Who is the male doctor?
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. How is D related to F?
Five students - X, Y, Z, W, and V - scored different marks in an exam. X scored more than Y but less than Z. W scored less than V but more than Y. Who scored the highest?
Four students - A, B, C, and D - scored different marks in an exam: 85, 90, 75, and 80. A scored more than B but less than C. D scored the lowest. Who scored 90?