The GCF is 1.
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GCF(4, 7, 9) = 1.
The GCF is "7"... for 63 and 56 7 x 8 = 56 7 x 9 = 63
The GCF is 1.
45 = 3 * 3 * 5 63 = 3 * 3 * 7 126 = 2 * 3 * 3 * 7 Gcf = 3 * 3 = 9 45/9 = 5 63 / 9 = 7 126 / 9 = 14
' 1 ' is the only common factor of those numbers.