A number can't have a factor greater than itself, so the GCF of a pair of numbers can't ever be greater than the smaller number. The GCF of 9 and 18 is 9.
A number pair whose GCF is the same as one of the numbers is i , i x j where i and j are integers greater than zero. If i=3 and j=5 then the number pair will be 3,15. The GCF is 3. If i=7 and j=11 the number pair will be 7,77 and the GCF 7. The number of possible solutions is infinite.
No, it's never greater than the smallest number.
To find a pair of numbers with a given GCF, take the GCF number and double it. The pair of numbers is the GCF, and two times the GCF. For instance, two numbers with a GCF of 3 are 3 and 6.
The GCF is a single number so there cannot be any pair of numbers in the answer.
In that case, the smaller number is the GCF of the pair.
When one of the numbers is a factor of the other.
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.
No but it can be the same as the biggest number as for example the gcf of 30 and 15 is 30
Yes.
Any consecutive even numbers have a GCF of 2.
The GCF is the factor, the LCM is the other one.