Respuesta :
3
We found the factors and prime factorization of 9 and 12. The biggest common factor number is the GCF number. So the greatest common factor 9 and 12 is 3.
Answer:
The common factor of 9 and 12 is 3
Step-by-step explanation:
1. List all the factors of both numbers
9:1,3,9
12:1,2,3,4,6,12