1. The difference of two integers is always a natural number - FALSE ; 2. The difference of two integers is always an integer. TRUE ; 3. The sum of two integers is always an integer. TRUE ; 4. The quotient of two integers is always an integer (provided the denominator is non-zero). TRUE ; 5. The ratio of two integers is always positive FALSE ; 6. The product of two integers is always an integer. TRUE ; 7. The quotient of two integers is always a rational number (provided the denominator is non-zero). FALSE