The factors of 81 are 1, 3, 9, 27, 81. For them to be common, they need to be compared to another set of factors.
Since 9 is a factor of 81, all of its factors are common.
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. ■
GCD: 27 LCM: 162 All common factors of 81 and 54 are all multiples of their LCM.
The common factors of 27 and 81 are: 1, 3, 9, and 27
81 and 200 have no common prime factors.
The common factors of 15 and 81 are 1 and 3
Factors of 63: 1, 3, 7, 9, 21 and 63.Factors of 81: 1, 3, 9, 27 and 81.Common factors are 1, 3 and 9.And another method is by finding the GCF of 63 and 81.The factors of GCF are the common factors of 63 and 81.GCF of 63 and 81 is 9. And factors of 9 are 1, 3 and 9.Instead of writing all factors of 63 and 81 it is better to find GCF and then its factors.
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 common factors of 72 and 81 are: 1, 3, and 9
34 and 81 share no common factors aside from 1.
81 and 169 share no common factors aside from 1.
The common factors of 36 and 81 are: 1, 3, and 9