The Greatest Common Factor (GCF) for 3, 7, 8 is 1
3 = 1, 3
7 = 1, 7
8 = 1, 2, 4, 8
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gcf(6, 7, 8) = 1.
Any two integers have a gcf. It is also possible for an odd and an even number to have a gcf other than one; for example, the following numbers (shown in factored form) have the gcf 7: 7 x 7 7 x 8 ex. 3 and 6, the GCF is 3 14 and 21 the GCF is 7
16: 1 2 4 8 16 21: 1 3 7 21 gcf: 1
3 = 1 x 3 5 = 1 x 5 7 = 1 x 7 GCF = 1
The GCF is 1.