Solutions by everydaycalculation.com

The GCF of 28 and 42 is 14.

- Find the prime factorization of 28

28 = 2 × 2 × 7 - Find the prime factorization of 42

42 = 2 × 3 × 7 - To find the GCF, multiply all the prime factors common to both numbers:

Therefore, GCF = 2 × 7 - GCF =
**14**

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Find hcf of: 56 & 84 14 & 21 84 & 126 140 & 210 196 & 294 4 & 6 56 & 42 28 & 84 84 & 42 28 & 126 140 & 42 28 & 210 196 & 42 28 & 294

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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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