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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.

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Wiki User

8y ago
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Wiki User

12y ago

The greatest factor common to 18 and 90 is 18.

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Cristina Custodio

Lvl 2
3y ago

18 is the greatest common factors of 18 and 90..

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Lala Gaga

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4mo ago

9

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Q: What is the greatest common factor of 18 and 90?
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