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Anonymous
The greatest common factor (GCF) of 63, 21, and 7 is 7.
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Since 7 is a factor of 21, it is automatically the GCF.
The GCF is 7.
It is: 7
The GCF is 21.
The LCM is: 441The GCF is: 7
The GCF of 21, 56, 63, and 84 is 7.