What is the highest common factor of 44?

Answer 1

There's no such thing as a common factor of a single number. "Common" means "same

for all", so you need at least two numbers before they can all have anything in common.

The "common" factor of one number is a lot like a scissor, an eyeglass, a shear, or the

sound of one hand clapping.

Answer 2

You need at least two numbers to find a GCF.