Solutions by everydaycalculation.com

The GCF of 18 and 5 is 1.

- Find the prime factorization of 18

18 = 2 × 3 × 3 - Find the prime factorization of 5

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

Therefore, GCF = 1

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Find hcf of: 36 & 10 54 & 15 90 & 25 126 & 35 36 & 5 18 & 10 54 & 5 18 & 15 90 & 5 18 & 25 126 & 5 18 & 35

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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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