15... Ps u shouldnt cheat on homework /:
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The greatest common factor of 90 and 130 is 10.
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 15,45, and 90 is 15.
The greatest common factor of 90 , 30 , 45 = 15
The greatest common factor of 54 and 90 is 18.