The factors of 81 are 1, 3, 9, 27, and 81. The factors of 99 are 1, 3, 9, 11, 33, and 99.
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The factors of 81 are: 1 3 9 27 81
The factors of 81 are 1, 3, 9, 27 and 81. For them to be common, they need to be compared to another set of factors.
The answer is 9.
Factors are numbers you can multiply together to get another number. 81: 1, 3, 9, 27, 81
Factors of 55 are: 1, 5, 11, and 55 Factors of 99 are: 1, 3, 9, 11, 33, and 99 "Common" factors are numbers that are factors of both. Common factors of 55 and 99 are: 1 and 11 .