One.
All whole numbers yes
All whole numbers have factors.
It is not possible to express something as a sum of whole numbers with no common factor. All whole numbers have at least 1 as a common factor.
1
Yes.
All whole numbers have 1 as a factor because 1 is a universal factor for every integer. In mathematical terms, a factor is a number that divides another number without leaving a remainder, and since 1 divides every whole number evenly, it is a factor of all whole numbers. Therefore, every whole number, starting from 0, has 1 as a factor.
Two is a factor of all even numbers.
All whole numbers except for -1, 0 and 1 have at least one prime factor.
Yes, 5 is a factor of all whole numbers ending in 5.
Only 1.
One.
Yes. Five is a factor of all cardinal (whole) numbers ending in five