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The GCF is 1.
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7 is a Prime number.
7 is not a factor of 72. The GCF is 8.
The GCF is 12.
GCF of 36 63 and 72 is 9.
The GCF is 72.
The GCF is 8.
The GCF is 2.
The GCF is 24.
The GCF is 9.