It is impossible to list the GCF of every pair of numbers, because there are infinitely many numbers. If you are looking for the GCF of any number by itself, the GCF of a single number is that number.
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The answer depends on whether or not the prime number is a factor of the other number.If the prime number is a factor of the other number then the GCF is the prime, otherwise the GCF is 1.
The GCF is the first number.
The GCF can be equal to the smaller number if the smaller number is a factor of the larger one. The GCF can be equal to both numbers if they are the same number. The GCF of 10 and 10 is 10.
In a set of numbers if one of the numbers is 1 then GCF is 1.Reason:GCF of a set of numbers can never be greater than the smallest number of the set. So in this case GCF can't be greater than 1.Since 1 is a factor of every number then it is the factor shared by every number.So 1 is always in the list of common factors.But here one of the numbers is 1 then GCF is 1 because 1 is the only common factor.
The GCF of one number is itself. To find the GCF, two or more numbers are needed.