Q: Are 21 and 130 relatively prime?

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Yes, they are relatively prime.

Yes, they are relatively prime.

Yes, they 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

No.

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It can be. 21 is relatively prime with 32.

Yes, they are relatively prime.

Yes, they are relatively prime.

Yes, they are relatively prime.

Yes, they are relatively prime.

Yes, they are relatively prime.

Yes, they are relatively prime.

Yes, they are relatively prime.

No, 14 and 21 are not relatively prime. They share the factor 7.No.

Yes, 4 and 21 are relatively prime. Numbers that are relatively prime only have the number 1 as a common factor. That is the case with 4 and 21.

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

No, they are not.