Four friends, A, B, C, and D, have different pets: a dog, a cat, a bird, and a fish. A does not have a dog. B has a cat. C does not have a fish. Who has the dog?
In a family of six members: P, Q, R, S, T, and U, there are two males and four females. P is a teacher, Q is a doctor, R is a male, and S is U's sister. Who is the doctor?
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?