Solutions by everydaycalculation.com

The GCF of 42 and 189 is 21.

- Find the prime factorization of 42

42 = 2 × 3 × 7 - Find the prime factorization of 189

189 = 3 × 3 × 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: 84 & 378 126 & 567 14 & 63 210 & 945 294 & 1323 6 & 27 84 & 189 42 & 378 126 & 189 42 & 567 210 & 189 42 & 945 294 & 189 42 & 1323

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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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