Since 12 is a factor of 144 and 12 is the largest factor of itself, the greatest common factor of 12 and 144 is 12.
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The greatest common factor of 132 and 144 is 12.
The GCF is 12.
The GCF is 12.
12 121 = 12 x 11 144 = 12 x 12
The GCF is 12.