5
The GCF is 15.
The GCF is 9.
The GCF is 1.
The GCF is 9.
The GCF is 5.
Since 15 is a factor of 45, it is automatically the GCF.
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GCF: 9 LCM: 180
The GCF is 80.
The GCF is 4.
The GCF is 8.
gcf of 80 and 100 is 20.The GCF is 20.