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Q: Are 12 and 54 relatively prime?

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No.

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

It can be. 40 is relatively prime to 41. 40 is not relatively prime to 54.

No, two even numbers cannot be relatively prime.

Yes, they are.

Yes

No, they are not relatively prime.

No, they can both be divided by two. No two even numbers can be relatively prime.

Yes, they are relatively prime.

Yes, they are relatively prime.

Yes

54 and 99 are not prime numbers because they have more than two factors.

10 and 21

12 and 30 are not relatively prime because they have two common prime factors (2 and 3).

12 and 35 are NOT prime numbers.

Nine can only be relatively prime when compared to another number or set of numbers. 9 is relatively prime to 4, 9 is not relatively prime to 12.

13

No, they are not.

no

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.

Relatively prime numbers are two or more numbers that can be compared with each other. A single number cannot be relatively prime.

35 and 49, among others.

Yes.