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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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8y ago
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9y ago

GCF(25, 27) = 1. The numbers are co-prime.

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11y ago

The GCF is 1.

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9y ago

The GCF is 3.

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13y ago

One.

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8y ago

It is: 1

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Q: What is the greatest common factor of 5 and 27?
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What is the the greatest common factor of 15 and 27?

The GCF of 15 and 27 is 3. One way to determine the greatest common factor is to find all the factors of the numbers and compare them. The factors of 15 are 1, 3, 5, and 15. The factors of 27 are 1, 3, 9, and 27. The common factors are 1 and 3. Therefore, 3 is the greatest common factor. The greatest common factor can also be calculated by identifying the common prime factors and multiplying them together. The prime factors of 15 are 3 and 5. The prime factors of 27 are 3, 3, and 3. The prime factors in common are a single 3, so the greatest common factor is 3.