In a family of six members A, B, C, D, E, and F, there are two males and four females. A is a teacher, B is a doctor, C is the mother of D, D is the son of E, and F is the sister of A. How many males are there in the family?
Five students: X, Y, Z, W, and V are participating in a competition. X is older than Y but younger than Z. W is older than V but younger than X. Who is the youngest among them?
In a cooking competition, five chefs X, Y, Z, W, and V are ranked based on their performance. X ranks higher than Y but lower than Z. W ranks higher than V but lower than Y. What is the correct ranking from highest to lowest?
Five students - A, B, C, D, and E - scored different marks in a test: 45, 55, 65, 75, and 85. A scored more than B but less than C. D scored 10 marks less than E. Who scored 55 marks?