No.
No, 54 and 165 are not relatively prime.
23, 31
2 and 3
x+y=54 x-y=20 solving it,we get x=37 and y=17
No, two even numbers cannot be relatively prime.
No, they can both be divided by two. No two even numbers can be relatively prime.
54 and 99 are not prime numbers because they have more than two factors.
No, they are not relatively prime. They both have 2 as a common factor. If two or more numbers are relatively prime, that means those numbers have no factors in common except for 1.
No.
Yes
Relative prime-ness requires a set of two or more numbers to share the same positive integer factors and no others. Since the number 54 adds the factors 9, 18, and 27, to the factors of 12, the two numbers are not relatively prime.
No, 54 and 165 are not relatively prime.
Yes, 35 and 54 are relatively prime.
hcf(10, 21) = 1 ⇒ 10 & 21 relatively prime hcf(12, 54) = 6 ⇒ 12 & 54 not relatively prime hcf(15, 27) = 3 ⇒ 15 & 27 not relatively prime hcf(21, 38) = 1 ⇒ 21 & 38 relatively prime
If two prime number have a sum of 54 they cannot have a sum of 84, and conversely.
You can multiply the number 18 by different numbers that are relatively prime, for example by different prime numbers.