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The factors of 12 are: 1, 2, 3, 4, 6, 12.

The factors of 30 are: 1, 2, 3, 5, 6, 10, 15, 30.

The common factors are: 1, 2, 3, 6.

The Greatest Common Factor (GCF) is: 6

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14y ago

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Wiki User

15y ago

Six -- six goes into 12 two times and six goes into 30 five times

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Wiki User

13y ago

30 = 2 x 3 x 5

12 = 2 x 2 x 3

Common is 2 x 3, so gcf = 6

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Wiki User

7y ago

It is: 1 but the highest common factor is 6

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Wiki User

12y ago

The HCF is: 6

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Wiki User

10y ago

The GCF is 6.

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Q: What is the highest common factor of 12and 30?
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