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# The greatest common factor of 7 and 7 is?

The greatest common factor of any number and itself must be that number. Here is why this is true. The factor of 7 are 1 and 7. So the common factors are 1 and 7 if you look a…t 7 and itself and the greatest of those two is 7. The GCF of 101 and 101 is 101. Just to drive the point home. (MORE)