yes
Yes.
yes
It must be a generalised rational number. Otherwise, if you select a rational number to multiply, then you will only prove it for that number.
Yes. Any rational number divided by another rational number is also rational.
No.
2175 is a composite number because it has more than two factors
2175
2175/34 is 63.9705882
Yes, because it has more than two factors
It is a rational number. It can be written as a fraction.
2175 ÷ 5 = 435
yes
Is 12.05 a rational number or irrational number?
1.96 is a rational number
It is a rational number, as it can be written as a fraction.
Yes, the sum is always rational.