The common factors of 6, 21, and 39 are 1 and 3
The common factors of 9, 21, and 24 are: 1 and 3
1 and 3
1 and 3 are common factors of 9 and 21
9 and 21 only have two common factors: 1 and 3.
Answer: 1 The factors of 9 are 1, 3, and 9. The factors of 21 are 1, 3, 7, and 21. The common factors are 1 and 3; the least (smallest) common factor is 1.
The factors of 21 are: 1, 3, 7, 21.The factors of 27 are: 1, 3, 9, 27.The common factors are: 1, 3
Since 21 is a factor of 63, all of its factors are common.
1 and 3 are both common factors of 9 and 21.
It is 3 and 1.
The greatest common factor is 3: Factors of 9: 1, 3, 9 Factors of 18: 1, 2, 3, 6, 9, 18 Factors of 21: 1, 3, 7, 21 The two common factors are 1 and 3 and the greatest of these two is 3.
They both have 1 and 3 as common factors