Solutions by everydaycalculation.com

The GCF of 63 and 84 is 21.

- Find the prime factorization of 63

63 = 3 × 3 × 7 - Find the prime factorization of 84

84 = 2 × 2 × 3 × 7 - To find the GCF, multiply all the prime factors common to both numbers:

Therefore, GCF = 3 × 7 - GCF =
**21**

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Find hcf of: 126 & 168 189 & 252 21 & 28 315 & 420 441 & 588 9 & 12 126 & 84 63 & 168 189 & 84 63 & 252 315 & 84 63 & 420 441 & 84 63 & 588

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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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