What is the greatest common factor of 42?

Answer 1

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.

Answer 2

We need at least two numbers in order to find gcf.