Question: what is the greatest common factor between 9 and 10?
Answer: Alternatively, the gcf of 9 and 10 can be found using the prime factorization of 9 and 10: The prime factorization of 9 is: 3 x 3. The prime factorization of 10 is: 2 x 5. The prime factors and multiplicities 9 and 10 have in common are: 1.