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The gcf of 16 and 42 is 2

One way to determine the greatest common factor is to find all the factors of the numbers and compare them.

The factors of 16 are 1, 2, 4, 8, and 16.

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

The largest factor they have in common is 2, so the greatest common factor is 2.

The greatest common factor can also be calculated by identifying the common prime factors and multiplying them together.

The prime factors of 16 are 2, 2, 2, and 2.

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

The prime factors they have in common are a single 2, so the greatest common factor is 2.
The GCF is 2.

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