1, 2, 4, 7, 8, 14, 28, 56 | 1 x 56, 2 x 28, 4 x 14, 7 x 8.
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The greatest common factor of 42 and 56 is 14.
To find this we must first factor both 14 and 56: 14 56 1 14 1 56 2 7 2 28 4 14 7 8 Next we find the common factors or the numbers that appear in both factor trees: 1,2,7,14 Thus the greatest common factor is 14!
56/1 = 56 56/2 = 28 56/4 = 14 56/7 = 8 1, 2, 4, 7, 8, 14, 28, 56
The GCF is 14.It is: 14
14