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The GCF of 42 and 108 is 6

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 108 are 1, 2, 3, 4, 6, 9, 12, 18, 27, 36, 54, and 108.

The common factors are 1, 2, 3, and 6. Therefore, the greatest common factor is 6.

Another way to find the GCF is to break the numbers into their prime factorizations and then multiply the common factors.

2 x 3 x 7 = 42

2 x 2 x 3 x 3 x 3 = 108

Select the common factors.

2 x 3 = 6, the GCF

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8y ago
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12y ago

The GCF is 12.

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6y ago

The GCF of 108 and 48 is 12.

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12y ago

12 Because 108/12=9 and 420/12=35

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7y ago

The GCF of 42, 78, and 108 is 6.

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10y ago

The GCF is 3.

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13y ago

12

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11y ago

6 is.

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Q: What is greatest common factor of 108 and 420?
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