Yes, because the GCF of 1 and any other number is 1.
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.
I can't give you an example of when that happens because that doesn't ever happen. The GCF of a pair of numbers can't be larger than the smaller number.
Yes, if one of the numbers is a factor of the other.
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.
There is none. The GCF is never larger than both numbers. The GCF is never larger than the smaller number.
No, it's never greater than the smallest number.
No, it's never greater than the lesser one.
The GCF is a single number so there cannot be any pair of numbers in the answer.
Any consecutive even numbers have a GCF of 2.
The product of the GCF and LCM of a pair of numbers is equal to the product of the numbers.