Solutions by everydaycalculation.com

The GCF of 86 and 18 is 2.

- Find the prime factorization of 86

86 = 2 × 43 - Find the prime factorization of 18

18 = 2 × 3 × 3 - To find the GCF, multiply all the prime factors common to both numbers:

Therefore, GCF = 2

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Find hcf of: 172 & 36 43 & 9 258 & 54 430 & 90 602 & 126 172 & 18 86 & 36 258 & 18 86 & 54 430 & 18 86 & 90 602 & 18 86 & 126

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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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