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Answer:

The common factors of 39 and 42 are 1 and 3.

The greatest common factor of 39 and 42 is 3.

Definition: A factor is a divisor - a number that will evenly divide into another number. The common factors of two or more numbers are all the factors that the numbers have in common. The greatest common factor of two or more numbers is the largest factor that the numbers have in common.

Methods:

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 39 are 1, 3, 13, and 39.

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

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. To then obtain the common factors, list all the factors of the greatest common factor.

The prime factors of 39 are 3 and 13.

The prime factors of 42 are 2, 3, and 7.

The only prime factor in common is 3, so the greatest common factor is 3. The factors of 3 are 1 and 3, which are the common factors.

More answers

The GCF is 3.

3

Q: What is the greatest common factor of 39 and 42?

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The Greatest Common Factor of 24 and 42 is 6.

the greatest common factor of 42 and 82 is 2

The GCF is 14.

There is not a greatest common factor of 42 because there cannot be a greatest 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. The factors of 42 are 1, 2, 3, 6, 7, 14, 21, and 42. The prime factors of 42 are 2, 3, and 7. Examples: The greatest common factor of 36 and 42 is 6. The greatest common factor of 42 and 91 is 7. The greatest common factor of 42 and 375 is 3.

The GCF of 42 and 86 is 2. 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 86 are 1, 2, 43, and 86. The common factors are 1 and 2. Therefore, the greatest common factor is 2.

Related questions

The greatest common factor of 39, 42, and 72 is 3

The GCF is 1.

The GCF is 3.

The greatest common factor of 42 and 12 is 6.

The greatest common factor of 42 and 66 is 6.6

The Greatest Common Factor (GCF) is: 6The greatest common factor of 42 and 102 is 6.

The greatest common factor of 12 , 42 = 6

The Greatest Common Factor of 24 and 42 is 6.

The greatest common factor of 13 and 42 is 1.

The greatest common factor of 42 and 196 is 14.

The greatest common factor of 16 and 42 is 2.

Since 3 is a factor of 42, it is automatically the GCF.