Solutions by everydaycalculation.com

The GCF of 6 and 18 is 6.

- Find the prime factorization of 6

6 = 2 × 3 - 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 × 3 - GCF =
**6**

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Find hcf of: 12 & 36 3 & 9 18 & 54 2 & 6 30 & 90 42 & 126 12 & 18 6 & 36 18 & 18 6 & 54 30 & 18 6 & 90 42 & 18 6 & 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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