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The GCF of 3, 15, and 21 is 3.

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βˆ™ 9y ago
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βˆ™ 9y ago

The GCF of 10, 15, and 21 is 1.

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βˆ™ 13y ago

3

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βˆ™ 14y ago

3

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βˆ™ 8y ago

It is: 1

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Q: What is the greatest common factor of 3 15 and 21?
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What is the greatest common factors of 15 and 21?

The greatest common factor of 15 and 21 is 3The factors of 15 are: 1, 3, 5, 15The factors of 21 are: 1, 3, 7, 21The common factors are: 1, 3The Greatest Common Factor (GCF) is: 3


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What is the greatest common factor of 15 21 and 27?

Answer: 3Definition: A factor is a divisor - a number that will evenly divide into another number. The greatest common factor of two or more numbers is the largest factor that the numbers have in common.Method:One way to determine the common factors and 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 21 are 1, 3, 7, and 21.The factors of 27 are 1, 3, 9, and 27.The common factors are 1 and 3. Therefore, the greatest common factor is 3.