11 and 22, among others.
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the gcf is 2 or 11
The GCF of two even numbers is even.
No, the only way the GCF and LCM of two numbers can be the same is if the numbers are the same.
You don't; you need at least two numbers to find a GCF.
The GCF of two numbers multiplied by their LCM will equal the product of the original numbers. If you know the GCF, divide it into the product of the two. The result will be the LCM. If the GCF of two numbers is 1, the LCM is their product.