gcf(54, 30, 42) = 6
54 = 2 x 3^3
30 = 2 x 3 x 5
42 = 2 x 3 x 7
hcf = 2 x 3 = 6
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If that's 6 and 42/54, find the GCF of 42 and 54. When you find out that the GCF is 6, divide them by it. The answer is 6 and 7/9.
The greatest common factor of 18, 30, and 42 is 2.
The GCF is 6.
The GCF of 16, 24, 30, and 42 is 2.
6 5*6=30 7*6=42 8*6=48