7 is not a factor of 90. It does not divide into 90 evenly.
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Respectively, they are 3, 7, 5 and 7 but those four numbers do not have a common prime factor.
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.
The greatest common factor of 54 and 90 is 18.
The greatest common factor of 90 and 130 is 10.