1, 2, 4, 8, 16, 32, 64
1, 3, 9, 27, 81
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The factors of 64 are all 2s and the factors of 81 are all 3s. The greatest common factor is 1, since they have no factors in common. ■
The GCF of 64 and 81 is 1. 64:1,3,4,8,16,32,64 81:1,3,9,27,81
The factors of...72= 1, 2, 3, 4, 6, 8, 9, 12, 18, 24, 36, and 7281= 1, 3, 9, 27, and 81The Greatest Common Factor= 9
The factors of 81 are: 1, 3, 9, 27, 81. The factors of 30 are: 1, 2, 3, 5, 6, 10, 15, 30.
The common factors of 27 and 81 are: 1, 3, 9, and 27