4
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The GCF is 4.
LCM(56, 84) = 168 GCF(56, 84) = 28
The GCF is 28.
28 is a factor of 56, and 28 is also a factor of itself. So the highest common factor of 28 and 56 is 28.
GCF of 28 42 and 56 is 14.The GCF is 14.(28 = 2 x 14, 42 = 3 x 14, 56 = 4 x 14)To find the GCF, factor the numbers and multiply their common prime factors:28 = 2 x 2 x 742 = 2 x 3 x 756 = 2 x 2 x 2 x 7Common factors are 2 x 7 = 14