2 x 3 x 7 = 42
3 x 3 x 7 = 63
3 x 7 = 21, the GCF
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The GCF/HCF of 36 and 63 is 9.The LCM of 36 and 63 is 252.
You need at least two numbers to find a GCF.
The factors of 45 are: 1, 3, 5, 9, 15, 45 The factors of 63 are: 1, 3, 7, 9, 21, 63
gcf(27, 45, 63) = 9. 27 = 3 x 3 x 3 45 = 3 x 3 x 5 63 = 3 x 3 x 7 hcf = 3 x 3 = 9
The hcf is 12