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The GCF of 12, 15, and 18 is 3.

The prime factorization of these numbers are as follows:

18 = 2 x 3 x 3

15 = 3 x 5

12 = 2 x 2 x 3

The only factor that appears in all three prime factorization is 3, so 3 is the greatest common factor.

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7y ago

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Wiki User

8y ago

The GCF is 3.

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Wiki User

8y ago

GCF(12, 18, 15) = 3.

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Q: What is the greatest common factor of 12 15 and 18?
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