The LCM is: 441
The GCF is: 7
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The GCF is: 21 because
Factors
42- 1, 42, 6, 7, 21, 2, 14, 3
63- 1, 63, 9, 7, 21, 3,
GCD: 1 LCM: 1764
The gcf of 2135 and 49 is 7
The GCF is 9.
The GCF is 36.
Since 49 is a factor of 98, it is automatically the GCF.