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Q: What are the common factors number 21?

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The factors of 21 are 1, 3, 7 and 21. To be common, they need to be compared to another set of factors.

Since 21 is a factor of 42, all of its factors are common.

A factor is a divisor - a number that will evenly divide into another number. 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 42 are 1, 2, 3, 6, 7, 14, 21, and 42. The factors of 63 are 1, 3, 7, 9, 21, and 63. The common factors are 1, 3, 7, and 21.

the greatest common factor of 8 21 and 75 is 1.

16 and 21 only have one common factor, the number one.

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.

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 12 are 1, 2, 3, 4, 6, and 12.The factors of 21 are 1, 3, 7, and 21.The factors of 105 are 1, 3, 5, 7, 15, 21, 35, and 105.The common factors are 1 and 3. Therefore, the greatest common factor is 3.

A factor is a divisor - a number that will evenly divide into another number. 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 21 are 1, 3, 7, and 21. The factors of 27 are 1, 3, 9, and 27. The common factors are 1 and 3. This means that the greatest common factor is 3.

The common factors of 21 and 63 are 1, 3, 7, and 21

There is neither a greatest common factor nor common factors of a single number, such as 21, because there cannot be any form of common factor without two or more numbers to compare. Common factors are factors that the numbers being compared have in common. The greatest common factor is the largest factor that all the numbers being compared have in common. Thus, since there are not two or more numbers to compare, there are neither common factors nor a greatest common factor. The factors of 21 are 1, 3, 7, and 21.

The common factors of 12 and 21 are 1 and 3.

The common factors are: 1, 3

The common factors of 21 42 and 84 are 21

Factors of 21... 1,3,7,21 Factors of 76... 1,2,4,19,38,76 Common factors to both numbers... 1

Common factors of 21 and 64 are: 1.

The common factors of 21 and 42 are 1,3,7,21

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.

The common factors of 21 and 42 are 3, 7 and 21. The greatest common factor (GCF) is 21.

The factors of 21 are: 1, 3, 7, 21.The factors of 42 are: 1, 2, 3, 6, 7, 14, 21, 42.The common factors are: 1, 3, 7, 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.

The common factors are: 1, 7

The only factors they have in common is one.

The common factors of 21 and 51 are: 1 and 3

The common factors of 30 and 21 are 1 and 3.

The common factors of 51 and 21 are: 1 and 3