Solutions by everydaycalculation.com

The GCF of 15 and 1800 is 15.

- Find the prime factorization of 15

15 = 3 × 5 - Find the prime factorization of 1800

1800 = 2 × 2 × 2 × 3 × 3 × 5 × 5 - To find the GCF, multiply all the prime factors common to both numbers:

Therefore, GCF = 3 × 5 - GCF =
**15**

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Find hcf of: 30 & 3600 45 & 5400 5 & 600 75 & 9000 3 & 360 30 & 1800 15 & 3600 45 & 1800 15 & 5400 75 & 1800 15 & 9000 105 & 1800

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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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