The GCF is 18.
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Well, honey, the greatest common factor of 126 and 198 is 18. It's like finding the biggest number that both 126 and 198 can divide evenly by without any drama. So, there you have it - 18 is the winner in this math showdown.
Greatest common factor of 198 and 275 is 11.
There are several possibilities of pairs of numbers whose greatest common factor is 18. 54 and 198 18 and 126 414 and 846 72 and 1422
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The GCF is 66.