In a family of six members A, B, C, D, E, and F, there are two males and four females. A is a doctor, B is a teacher, C is the mother of D, D is the son of E, and F is the sister of A. Who is the male member in the family?
From the following items: 1) Red, 2) Blue, 3) Green, 4) Yellow, and 5) Black, the selection criteria are: 1) Red and Blue cannot be selected together. 2) Green must be selected if Yellow is selected. 3) Black can only be selected if Red is selected. Which of the following selections is valid?
In a race, five runners P, Q, R, S, and T finished in the following order: P finished before Q but after R. S finished before T but after Q. What is the finishing order?
A, B, C, D, and E are five friends who visited different places in a day. A visited before B but after C. D visited before E but after B. What is the correct order of visits?
In a cooking competition, five chefs: X, Y, Z, W, and V, prepared dishes in a specific order. X cooked before Y but after Z. W cooked before V but after Y. What is the correct sequence of cooking?