Solutions by everydaycalculation.com

The gcf of 6 and 9 is 3.

- Find the prime factorization of 6

6 = 2 × 3 - Find the prime factorization of 9

9 = 3 × 3 - To find the gcf, multiply all the prime factors common to both numbers:

Therefore, GCF = 3

The greatest common factor (gcf) is also known as greatest common divisor (gcd) or highest common factor (hcf).

Find hcf of: 12 & 18 18 & 27 2 & 3 30 & 45 42 & 63 12 & 9 6 & 18 18 & 9 6 & 27 30 & 9 6 & 45 42 & 9 6 & 63

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