Solutions by everydaycalculation.com

The gcf of 49 and 20 is 1.

- Find the prime factorization of 49

49 = 7 × 7 - Find the prime factorization of 20

20 = 2 × 2 × 5 - 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: 98 & 40 147 & 60 245 & 100 343 & 140 98 & 20 49 & 40 147 & 20 49 & 60 245 & 20 49 & 100 343 & 20 49 & 140

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