18. All numbers' highest factor is the number itself.
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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.
2 is the greatest common factor of 18 and 562
The Greatest Common Factor is 18
Greatest common factor of 18 36 and 90 is 18.
The greatest common factor for 18 and 44 is 2.2