It is: 3
What is the Greatest common factor of 21 and 84
3
It is 7
Since 21 is a factor of 63, it is automatically the GCF of this problem.
7 because:::1,2,7,141,3,7,21
The greatest common factor of 18 21 and 42 is 3.
The GCF is 3.
The greatest common factor of 18 and 21 is 3.
The Greatest Common Factor of 9, 18, 21: 3
The GCF of 21, 45, and 48 is: 3
The factors of 18 are 1, 2, 3, 6, 9, and 18. The factors of 21 are 1, 3, 7, and 21. The common factors are 1 and 3. Therefore, the least common factor (the smallest common factor) is 1. Factorizations: 18-3x3x2 21-7x3
The highest common factor of 21 and 18 is 3