False. Consider 4 and 9. Neither are prime, but they have no common factors other than 1 and are therefore relatively prime. More generally, any two numbers p^n and q^n where p, q both prime and n<>p or q and n>1 are relatively prime. This is by no means all pairs of relatively prime numbers, but it's an easy way to find examples where neither of the pair is prime.
1 + 2 + 3 + 5 + 7 = 18 False sorry, that is true, since 1 is not considered a true prime by definition
False
if by Numbers you mean Integers, then the answer is TRUE. if it is real numbers, then it is false.
true
It is false. It does not include negative fractional numbers.
Any two prime numbers are relatively be prime?
Two composite numbers may or may not be relatively prime, depending on their factors. Relatively prime numbers are sets of two or more numbers having 1 as their greatest common factor (gcf). All even numbers have 2 as a common factor, so no even number is relatively prime with any other even number.
True. By definition for two numbers to be relatively prime they must not share any common factors. So their greatest (and only) common factor would be 1.
False.
2 is prime
false
No, 2 is prime.
Any two different prime numbers are relatively prime because relatively prime numbers are sets of two or more numbers having 1 as their greatest common factor.
False - 2 + 11 = 13.
It is true. Two numbers are relatively prime if they do not have any factors in common greater than 1. A prime number has only two factors - 1 and itself. Thus, two different prime numbers will only have 1 as a common factor, which means they are relatively prime.
The statement is false.
False because 2 is an even number which is also a prime number.