It is: 100
The difference between 375 and 400 is 25, so that is the largest possible value for the GCF. In fact, 100, 375, and 400 are all divisible by 25, so it is the GCF.
100100
The GCF is 25.
The GCF is 100.
The GCF is 400.
The GCF is 1.
The GCF is 25.
The GCF is 25.
If that's 25, 100 and 50, the GCF is 25. If that's 25100 and 50, the GCF is 50.
The GCF is: 4
The GCF is: 4
The GCF is 5.