The greatest common factor is 1 in the case of 75 and 41. 41 is a Prime number, and as it doesn't go evenly into 75, 1 is the only common factor.
The GCF is 75.
If you mean 300 and 450 then the GCF is 150
The GCF is 1.
The GCF is 1.
The GCF is 1.
The GCF is 1.
The GCF is 1.
The GCF is 41.
GCF(82, 41) = 41.
The GCF is 75.
The GCF is 75.
The GCF is 75.