Solutions by everydaycalculation.com

The gcf of 15 and 8 is 1.

- Find the prime factorization of 15

15 = 3 × 5 - Find the prime factorization of 8

8 = 2 × 2 × 2 - To find the gcf, multiply all the prime factors common to both numbers:

Therefore, GCF = 1

The greatest common factor (gcf) is also known as greatest common divisor (gcd) or highest common factor (hcf).

Find hcf of: 30 & 16 45 & 24 75 & 40 105 & 56 30 & 8 15 & 16 45 & 8 15 & 24 75 & 8 15 & 40 105 & 8 15 & 56

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