The Greatest Common Factor (GCF) of 90 and 98 is 2.
Since 90 is a multiple of 18, 18 is the GCF of 18 and 90
The greatest common factor of the numbers 90, 12, 61 and 98 is 1.
The GCF is 2.
The GCF is 2.
The GCF is 14.
The GCF is 49.
The GCF is 1.
The GCF is 2.
The GCF is 14.
The GCF is 2.
The GCF is 2.
The GCF is 2.