0
Anonymous
prime factors first:
64 = 2 * 2 * 2 * 2 * 2 * 2
72 = 2 * 2 * 2 * 3 * 3
90 = 2 * 3 * 3 * 5
gcf is 2
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The GCF of 64 and 90 is: 2
72 / 64 = 1 r 8 64 / 8 = 8 r 0 GCF of 72 and 64 is 8.
The Greatest Common Factor (GCF) of 64 and 72 is 8.
The GCF is 9.
The GCF is 18.