15, 49, 55, 87, 91,105 are the composite numbers.
The GCF is 1.
The GCF is 1.
The GCF is 5.
The GCF of 12 and 87 = 3
The GCF is 1.
The GCF is 1.
You need at least two numbers to find a GCF. If that's 55 and 9, or 5 and 59, their GCFs are both 1.
15, 49, 55, 87, 91,105 are the composite numbers.
The GCF is 29.
The GCF is 3.
The GCF is 1.
The GCF is 1.
The GCF is 3.
The GCF is 1.
The GCF is 1.
Prime: 19, 23, 59, 103