4
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The GCF is 2.
the hcf of 12 and 20 = 4
It is 1 but the HCF is 2
The Highest Common Factor (HCF) of 64 and 56 is 8. To find the HCF, you can determine the factors of both numbers: 64 (1, 2, 4, 8, 16, 32, 64) and 56 (1, 2, 4, 7, 8, 14, 28, 56). The largest number that appears in both lists is 8, making it the HCF of 64 and 56.
If you mean 28, 49 and 84 then the hcf is 7