True or False:



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

1. The sum of two natural numbers is always a natural number.
   
   
2. The ratio of two natural numbers is always positive
   
   
3. The quotient of two natural numbers is always a rational number
   
   
4. The difference of two natural numbers is always a natural number.
   
   
5. The difference of two natural numbers is always an integer.
   
   
6. The quotient of two natural numbers is always a natural number.