Well yes they are relativley prime numbers.
No.
No.
No.
4 and 9
209, 211 and any prime number.
No. To be relatively prime, numbers have to have a GCF of 1. Numbers ending in 5 are divisible by 5.
Positive integers are considered relatively prime when their GCF is 1, that is, when they have no common prime factors.
Their high common factor is 1
All numbers greater than 2 are composites, not prime numbers.
So the composites won't get all bunched up.
No - prime numbers are numbers that can only be divided by 1 and itself. 25 and 49 are examples of perfect squares 5*5 = 25 and 7*7=49