True or False:



1. The product of two natural numbers is always a natural number.

2. The sum of two natural numbers is always a natural number.

3. The ratio of two natural numbers is always positive

4. The quotient of two natural numbers is always a rational number

5. The difference of two natural numbers is always a natural number.

6. The difference of two natural numbers is always an integer.

7. The quotient of two natural numbers is always a natural number.