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Anonymous
The greatest common factor of 36, 81 and 18 is 9
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The GCF is 9.
GCF(81, 36, 18) = 9.
You need at least two numbers. 18 and 36 among others.
It would be 18.
The GCF of 36, 68, and 92 is 4.
The GCF is 18.