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You need at least two numbers to find a GCF.
For example:
The GCF of 21 and 9 = 3
The GCF of 21 and 28 = 7
Wiki User
∙ 8y ago
Wiki User
∙ 11y agoYou need at least two numbers to find a GCF.
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What are the common factors and greatest common factor of 21 and 42?
The common factors of 21 and 42 are 3, 7 and 21. The greatest common factor (GCF) is 21.
What are the greatest common factors of 21 and 36?
The greatest common factor is 3
What is the greatest common factors of 63 and 147?
The greatest common factor of 63 and 147 is 21.
What are the greatest common factors of 21?
The factors of 21 are 1, 3, 7, and 21. For them to be common, they need to be compared to another set of factors.
What are the common factors of 14 and 21?
The factors of 14 and 21 are: 14: 1,2,7,14 21:1,3,7,21 The common factors are:1 and 7. Therefore 7 is the greatest common factor (GCF)
What ARE THE common factors and greatest common factors of 21 and 28?
The common factors are 1 and 7. The GCF is 7.
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
What are greatest common factors of 14 and 21?
The Greatest Common Factor (GCF) is: 7
What are the greatest common factors of 21 and 18?
The Greatest Common Factor (GCF) is: 3
What are the greatest common factors of 10 and 21?
The Greatest Common Factor (GCF) is: 1
Greatest common factors for 21 and 56?
The Greatest Common Factor (GCF) is: 7
What are the factors of 14 and 21 and the greatest common factor?
The factors of 14 are: 1, 2, 7, 14.The factors of 21 are: 1, 3, 7, 21.The Greatest Common Factor (GCF) is: 7.
