Problem On Age

We are given the following information about the ages of A, B, C, and D: (A) A is 3 years younger than C. (B) A is one year older than D. (C) D is one year older than B. (D) D is 4 years younger than C. (E) C is 15 years old. We need to find the age of B. Let's use the given information step by step: From statement 5, we know that the age of C is 15 years. From statement 1, A is 3 years younger than C: Age of A years. From statement 2, A is one year older than D: Age of D years. We can verify this with statement 4, D is 4 years younger than C: Age of D years. This is consistent. Now, from statement 3, D is one year older than B: Age of B years. Therefore, the age of B is 10 years.