Yes.
Yes. It's a multiple of each of them.
No. One, a counting number, doesn't belong to either of those sets.
No. Rational numbers are those numbers that can be expressed as a ratio of two integers. 2.4, for example, is a rational number (it can be written as the ratio 12/5), but not a counting number.
Numbers that are relatively prime.
If the product of 2 numbers is one, than those 2 numbers are recipricals
Yes.
The product of all those numbers will always be a negative number.
You can calculate the sum of numbers by adding numbers together. You can calculate the product of numbers by multiplying those numbers.
The natural numbers are the counting numbers Thus the set m of those counting numbers less than 5 is: m = {1, 2, 3, 4}
Because it will have those numbers as factors.
Those are 'factors'.
Those are all the counting numbers from 1,000 to 9,999. That's the same as all the counting numbers up to 9,999 minus the first 999, so there are 9,000 of them.