# What is the greatest common factor of 18 and 45

answered by **Guest**

The prime factorization of 18 is: 2 x 3 x 3.The prime factorization of 45 is: 3 x 3 x 5.The prime factors and multiplicities 18 and 45 have in common are: 3 x 3.3 x 3 is the gcf of 18 and 45.gcf(18,45) = 9.

If not sure about the answer, try using the search to find other answers in the subject Mathematics or ask your question yourself.

See other answers