Four friends - Alex, Brian, Charlie, and David - have different favorite colors: Red, Blue, Green, and Yellow. Alex does not like Blue or Green. Brian's favorite color is not Red. Charlie likes Green. What is David's favorite color?
In a cooking competition, Chef A finishes before Chef B but after Chef C. Chef D finishes after Chef B but before Chef E. What is the order of the chefs from first to last?
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 the mother of S. T is not a male. Who is the father?