Four friends - Alex, Brian, Charlie, and David - have different favorite colors: Red, Blue, Green, and Yellow. Alex does not like Blue or Green. Brian likes Red. Charlie's favorite color is not Yellow. What is David's favorite color?
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 a doctor, and R is a male. S is not a teacher. Who is the doctor?
In a race, the following conditions are given: Runner X finished before Runner Y, Runner Z finished after Runner W, and Runner Y finished after Runner W. What is the correct order of finishers?
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 and D. E is the sister of B. F is the brother of D. How is E related to F?