Solutions by everydaycalculation.com

The GCF of 45 and 245 is 5.

- Find the prime factorization of 45

45 = 3 × 3 × 5 - Find the prime factorization of 245

245 = 5 × 7 × 7 - To find the GCF, multiply all the prime factors common to both numbers:

Therefore, GCF = 5

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Find hcf of: 90 & 490 135 & 735 225 & 1225 9 & 49 315 & 1715 90 & 245 45 & 490 135 & 245 45 & 735 225 & 245 45 & 1225 315 & 245 45 & 1715

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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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