You need at least two numbers to find a GCF.
There is not even one method, leave alone three. The greatest common factor (GCF) refers to a factor that is COMMON to two or more numbers. You have only one number in the question!
The GCF of the given three numbers is 5
5 and 10 10 and 15 5 and 15
5 and 10 10 and 15 15 and 20
50
The GCF is 5.
The GCF is 1.
the gcf is 10
The GCF is 10.
The GCF is 10.
The GCF is 10.
Keep adding 10 eight times or Multiply 10 by the first eight counting numbers
The GCF of 10 and 54 is 2.