Solutions by everydaycalculation.com

The GCF of 10 and 28 is 2.

- Find the prime factorization of 10

10 = 2 × 5 - Find the prime factorization of 28

28 = 2 × 2 × 7 - To find the GCF, multiply all the prime factors common to both numbers:

Therefore, GCF = 2

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Find hcf of: 20 & 56 5 & 14 30 & 84 50 & 140 70 & 196 20 & 28 10 & 56 30 & 28 10 & 84 50 & 28 10 & 140 70 & 28 10 & 196

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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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