It is: 16
The highest common factor of the numbers 32, 80 and 160 is 16.
21 and 80's highest common factor is one.
Since 8 is a factor of 80, it is automatically the GCF.
10
The GCF is 20.
The GCF is 16.
It is: 5
The GCF is 8.
It is: 8
72 and 80's highest common factor is eight.
80 and 400's highest common factor is 80.
The Greatest Common Factor (GCF) is: 40