The GCF is 1.
The GCF is 28.
The GCF is 3.
The GCF is: 1
1, 2, 4, 7, 8, 14, 28, 56 1, 3, 9, 27, 81 The GCF is 1.
Since 28 is divisible by both 2 and 7, the LCM is 28.
The GCF is 27.
The GCF is 28.
The GCF of 10 and 28 is 210 factors to [2 * 5]27 factors to [2 * 2 * 7]The common factor is 2, so the GCF is 2.There is none
The GCF is 27.
The GCF of 27 and 81 is 27. And their LCM is 81.
The GCF is 27.