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3, 4, and 7 are the common factors of 9 12 and 21.

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6y ago
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13y ago

The prime factors of 9 are 3 and 3

The prime factors of 12 are 2, 2 and 3

So, the only factor common between 12 and 9 is 3

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11y ago

1 and 3

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Q: What are the common factors for 12 and 9?
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Related questions

What are the common factors of 9 and 12?

The factors of 9 are 1, 3, and 9. The factors of 12 are 1, 2, 3, 4, 6, and 12. The common factors are 1 and 3.


What are the common factors of 9 15 and 12?

The common factors of 9, 12, and 15 are 1 and 3. The GCF is 3.


4Common factors for 9 and 12?

Factors of 9 are 1, 3, and 9; factors of 12 are 1, 2, 3, 4, 6, and 12. There are only two common factors of 9 and 12: 1 and 3.


What is the least common factor of 9 12 and 15?

The factors of 9 are 1, 3, and 9. The factors of 12 are 1, 2, 3, 4, 6, and 12. The factors of 15 are 1, 3, 5, and 15. The common factors of 9, 12, and 15 are 1 and 3. Therefore, the least common factor (the smallest common factor) is 1.


What is the greatest common factor of 3 9 and 12?

The GCF of 3, 9, and 12 is 3. Factors of 3 - 1 and 3 Factors of 9 - 1, 3, and 9 Factors of 12 - 1, 2, 3, 4, 6, and 12 The factors that they have in common are 1 and 3. So the GCF, or Greatest Common Factor, is 3.


What are the common factors of 12 36 and 27?

The factors of 27 are:1, 3, 9, 27The factors of 36 are:1, 2, 3, 4, 6, 9, 12, 18, 36The common factors are:1, 3, 9


What is the common factor of 9 and 12?

The factors of 9 are 1, 3, and 9. The factors of 12 are 1, 2, 3, 4, 6, and 12. The common factors of 9 and 12 are 1 and 3.9 ~ 1,3,912 ~ 1,2,3,4,6,12


What are the common factors of 9 12 and 18?

The common factors are 1 and 3.


What is the greatest common factor of 9 and 12?

The greatest common factor of 9 and 12 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 9 are 1, 3, and 9. The factors of 12 are 1, 2, 3, 4, 6, and 12. The common factors are 1 and 3. Therefore, the greatest common factor is 3. The greatest common factor can also be calculated by identifying the common prime factors and multiplying them together. The prime factors of 9 are 3 and 3. The prime factors of 12 are 2, 2, and 3. The prime factors in common are a single 3, so the greatest common factor is 3.


What are common factors of 9 and 12?

1 and 3.


What are the greatest common factors of 9 and 12?

3


What are the common factors of 12 9?

They are: 1 and 3