Solutions by everydaycalculation.com

The GCF of 4 and 90 is 2.

- Find the prime factorization of 4

4 = 2 × 2 - Find the prime factorization of 90

90 = 2 × 3 × 3 × 5 - To find the GCF, multiply all the prime factors common to both numbers:

Therefore, GCF = 2

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Find hcf of: 8 & 180 2 & 45 12 & 270 20 & 450 28 & 630 8 & 90 4 & 180 12 & 90 4 & 270 20 & 90 4 & 450 28 & 90 4 & 630

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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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