The factors of 81 are:
1, 3, 9, 27, 81
The factors of 108 are:
1, 2, 3, 4, 6, 9, 12, 18, 27, 36, 54, 108
The common factors are:
1, 3, 9, 27
The Greatest Common Factor (GCF) is:
27
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9(9 + 3) = (9 x 9) + (3 x 9) = 12 x 9 = 108
The least common multiple of 81 and 108 is 324.
GCF of 63 and 108 is 9.
The GCF is 9.
GCF(108, 300) = 12.