Solutions by everydaycalculation.com

The GCF of 90 and 100 is 10.

- Find the prime factorization of 90

90 = 2 × 3 × 3 × 5 - Find the prime factorization of 100

100 = 2 × 2 × 5 × 5 - To find the GCF, multiply all the prime factors common to both numbers:

Therefore, GCF = 2 × 5 - GCF =
**10**

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Find hcf of: 180 & 200 45 & 50 270 & 300 450 & 500 18 & 20 630 & 700 180 & 100 90 & 200 270 & 100 90 & 300 450 & 100 90 & 500 630 & 100 90 & 700

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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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