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The Highest Common Factor (HCF) of 15 and 21 is 3. To find the HCF, we need to determine the largest number that divides both 15 and 21 without leaving a remainder. The factors of 15 are 1, 3, 5, and 15, while the factors of 21 are 1, 3, 7, and 21. The largest number that appears in both lists is 3, making it the HCF of 15 and 21.
Oh, dude, the Highest Common Factor (HCF) of 15 and 21 is 3. It's like the biggest number that can divide both 15 and 21 without leaving any remainder. So yeah, 3 is the HCF, but like, who really cares, right?
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I need to know which pair of numbers in relatively prime 10 and 21 or 12 and 54 or 15 and 27 or 21 and 38?
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
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The GCF is 7.
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What is HCF of 525 and 231?
The HCF of 525 and 231 is 21
