How do you know if the greatest common factor of two numbers is two just by looking at it?

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asked Jun 15, 2018 111k views

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Michaelangelo · Answer 1 · 2018-06-22T11:43:47+0000

Well, you know just by looking at it because it ends in an even number. Like, the greatest common factor of 4 is 2, 1.) Because no other number can "go into it," and 2.) Because it's even.

How do you know if the greatest common factor of two numbers is two just by looking at it?

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