John is an intelligent student. He studied \(8\)th standard. John and his friends are discussing rational numbers. John says,"If we add, subtract or multiply any two rational numbers, the result is always a rational number."
Based on the above situations try to find the answers for the below questions.
1. Which of the following operations on rational numbers is not always closed?
2. Which of the following result is not closed?
3. If \(a\) and \(b\) are two rational numbers then which of the following is always true?
4. The result of \(\frac{3}{5}+\frac{5}{7}\) is a