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The GCF of 18, 25, and 27 is 1.

The prime factorization of 18 is 2*3*3

The prime factorization of 25 is 5*5

The prime factorization of 27 is 3*3*3

Since they have no factors in common, their GCF is 1, and they are called "coprime."

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9y ago

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