The GCF (Greatest Common Factor) of 1, 49, and 153 is 1, because 1 does not have any other factors.
The GCF is 1.
That would be 1. The only other factor of 49 is 7, and that doesn't work.
The GCF is 1.
The GCF is 1.
The GCF is 1.
The GCF is 1.
The GCF is 1.
The GCF is 1.
The GCF is 1.
The GCF is 1.
It is: 1
It is just 1