Solutions by everydaycalculation.com

The gcf of 42 and 72 is 6.

- Find the prime factorization of 42

42 = 2 × 3 × 7 - Find the prime factorization of 72

72 = 2 × 2 × 2 × 3 × 3 - To find the gcf, multiply all the prime factors common to both numbers:

Therefore, GCF = 2 × 3 - GCF =
**6**

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Find hcf of: 84 & 144 21 & 36 126 & 216 14 & 24 210 & 360 294 & 504 84 & 72 42 & 144 126 & 72 42 & 216 210 & 72 42 & 360 294 & 72 42 & 504

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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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