The GCF is 30.
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30
Answer is 90
The GCF is 90.
Well, honey, 630 and 1080 have a hot date with the number 90 because 90 is a common factor for both of them. So, you can divide 630 by 90 to get 7, and divide 1080 by 90 to get 12. Looks like 90 is the matchmaker for these two numbers!
Since 18 is a factor of 90 and it is the largest factor of itself, the greatest common factor of 18 and 90 is 18.Since 18 is a factor of 90, it is automatically the GCF.