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The factors of 6 are 1, 2, 3, and 6. The factors of 21 are 1, 3, 7, and 21. The common factors of 6 and 21 are 1 and 3, and the GCF is 3.

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14y ago

The factors of 6 are: 1, 2, 3, 6

The factors of 21 are: 1, 3, 7, 21

The common factors are: 1, 3

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Q: Common factors of 6 and 21?
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Continue Learning about Basic Math

Common factors of 18 and 21?

The factors of 21 are 1, 3, 7 and 21. The factors of 18 are 1, 2, 3, 6, 14 and 18. Therefore the common factors are 1 and 3.


What are the common factors of 21 and 42?

The common factors of 21 and 42 are the numbers that divide both 21 and 42 without leaving a remainder. The factors of 21 are 1, 3, 7, and 21, while the factors of 42 are 1, 2, 3, 6, 7, 14, 21, and 42. The common factors of 21 and 42 are 1, 3, 7, and 21.


What is the greatest common factor of 6 and 21?

The greatest common factor (GCF) of two numbers is the largest number that divides both of them without leaving a remainder. To find the GCF of 6 and 21, you can list the factors of each number and identify the largest factor they have in common. The factors of 6 are 1, 2, 3, and 6, while the factors of 21 are 1, 3, 7, and 21. The greatest common factor of 6 and 21 is 3.


Is 6 a common factor of 42 and 84?

Yes. The factors of 42 are 1, 2, 3, 6, 7, 14, 21, and 42. The factors of 84 are 1, 2, 3, 4, 6, 7, 12, 14, 21, 28, 42, and 84. The common factors are 1, 2, 3, 6, 7, 14, 21, and 42. One of the common factors is 6.


What are the common factors of 12 and 21?

The common factors of 12 and 21 are 1 and 3. 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 12 are 1, 2, 3, 4, 6, and 12. The factors of 21 are 1, 3, 7, and 21. The common factors are 1 and 3. This means that the greatest common factor is 3. The numbers are 1 and 3