Solutions by everydaycalculation.com

The GCF of 55 and 420 is 5.

- Find the prime factorization of 55

55 = 5 × 11 - Find the prime factorization of 420

420 = 2 × 2 × 3 × 5 × 7 - To find the GCF, multiply all the prime factors common to both numbers:

Therefore, GCF = 5

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Find hcf of: 110 & 840 165 & 1260 275 & 2100 11 & 84 385 & 2940 110 & 420 55 & 840 165 & 420 55 & 1260 275 & 420 55 & 2100 385 & 420 55 & 2940

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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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