Best Answer

Answer: 3

Definition: 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.

Q: What is the greatest common factor of 12 21 and 105?

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The greatest common factor of the given numbers is 3

The greatest common factor of 12 and 68 is 4

The greatest common factor of the numbers 12, 24 and 48 is 12.The factors of 12 are 1,2,3,4,6,12The factors of 24 are 1,2,3,4,6,8,12,24The factors of 48 are 1,2,3,4,6,8,12,16,24,48so the greatest common factor is 12

The greatest common factor of 12 and 56 is 4.

3 is the greatest common factor of 9 and 12.

Related questions

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The greatest common factor of the given numbers is 3

The greatest common factor of 42 and 12 is 6.

The Greatest Common Factor of 12, 60 is 12.

The Greatest Common Factor of 12 and 10 is 2.

The Greatest Common Factor (GCF) is: 12

The greatest common factor of 12 , 42 = 6

The greatest common factor of 12 , 14 = 2

The greatest common factor of 12 , 133 = 1

The greatest common factor of 12 and 78 is 6.

The greatest common factor of 12 and 34 is 2.