11 has no factors except 1
(11 is a Prime number)
It can be. 11 is a proper factor of 22, among others.
The proper factors of 99 are: 1, 3, 9, 11, 33. A proper factor is any factor of the number that is not itself.
No, 11 is itself a prime so no prime number can be a proper factor of 11.
a proper factor is a factor.
The only proper factors of 77 are 7 and 11. 11 isn't a factor of 259 but 7 is, so the answer is 7.
No. Prime numbers don't have proper factors.
It can be. 18 is a proper factor of 36.
It can be. 25 is a proper factor of 50.
It can be. 24 is a proper factor of 48.
It can be. 42 is a proper factor of 84.
It depends on the number being factored. 22 is a proper factor of 44. 22 is a factor, but not a proper factor, of 22.
It can be. 22 is a proper factor of 44.