Solutions by everydaycalculation.com

The GCF of 27 and 78 is 3.

- Find the prime factorization of 27

27 = 3 × 3 × 3 - Find the prime factorization of 78

78 = 2 × 3 × 13 - To find the GCF, multiply all the prime factors common to both numbers:

Therefore, GCF = 3

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Find hcf of: 54 & 156 81 & 234 9 & 26 135 & 390 189 & 546 54 & 78 27 & 156 81 & 78 27 & 234 135 & 78 27 & 390 189 & 78 27 & 546

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The greatest common factor (GCF) is also known as greatest common divisor (GCD) or highest common factor (HCF).

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