The greatest common factor of the numbers 54 and 30 is 6.
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The GCF is 6.
To find the GCF of two or more numbers, you can list the factor pairs of all the numbers and then look for the largest factor that is common to all the numbers. 42: 1 x 42 2 x 21 3 x 14 6 x 7 30: 1 x 30 2 x 15 5 x 6 54: 1 x 54 2 x 27 3 x 18 6 x 9 6 is the GCF of 42, 30, and 54.
The GCF is 6.
The GCF is 27.
The GCF of 54, 48, and 60 is 6.