Yes, 3 and 20 are relatively prime because they have no common factor greater than 1.
No, they are not relatively prime.
No, they are not relatively prime.
Yes, they are relatively prime.
yes, they are relatively prime.
If you don't include 20, 25 and 30, all of the numbers in that range are relatively prime to 25.
No combinations of even numbers can be relatively prime.
Yes, they are relatively prime.
No.
10=2*5 Any number that doesn't have a factor of 2 or 5 is relatively prime to 10. e.g. 3, 7, 11, and 21 are all relatively prime to 10. 2, 5, 15, 16, and 20 are not relatively prime since they share a factor or 2 or 5 (or both, which means they share a factor of 10, e.g. 20).
No, 57 and 96 are not relatively prime because they share a common factor of 3.
No. If they are even numbers and not 2, they are not prime. 20 is divisible by 1, 2, 4, 5, 20, and 20. 18 is divisible by 1, 2, 3, 6, 9, and 18.
A number cannot be "relatively prime" except in relation to another number. For example, 8 and 15 are relatively primebecause they contain no prime factors in common.