The GCF is 5.
The GCF is 5.
The GCF is 5.
GCF(20, 25, 35, 40) = 5 The GCF of any set of numbers is also a factor of the difference of any pair of them. So the GCF must be a factor of 5 (= 25-20). This narrows down the options quite considerably!
20, 21, 22, 24, 25
The GCF is 1.
1
The greatest common factor of 20, 21, and 25 is 1. Although 20 and 25 can be divisible by 5, 21 can not. Therefore, the only common factor between these three numbers is 1 and it's the greatest one as well.
The GCF is 5.
The GCF is 5.
The GCF is 1.
The GCF of 15 and 27 is 3. The GCF of 15, 20 and 25 is 5. The GCF of 15, 27, 15, 20 and 25 is 1.
The GCF is 20.
The GCF is 5.
The GCF is 5.
The GCF is 5.
The GCF is 5.