MCQ Practice Mathematics 📖 If x and y are prime numbers, which of the following cannot be the sum of x and y? A 13 B 23 C 5 D 9 Favorite Practice Add to Book Explanation & Answer Detailed explanations and answers are restricted. Unlock full access by logging in to your account. 🔒 Unlock the detailed explanation and answers Log In / Sign Up PreviousIf x = 12, which of the following has the maximum value? NextIf x is an integer, then which of the following is always an even integer?