Solutions by everydaycalculation.com

The GCF of 77 and 20 is 1.

- Find the prime factorization of 77

77 = 7 × 11 - Find the prime factorization of 20

20 = 2 × 2 × 5 - To find the GCF, multiply all the prime factors common to both numbers:

Therefore, GCF = 1

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Find hcf of: 154 & 40 231 & 60 385 & 100 539 & 140 154 & 20 77 & 40 231 & 20 77 & 60 385 & 20 77 & 100 539 & 20 77 & 140

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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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