What is a factor tree for 27?

Answer 1

take 27 and stick two branches out the bottom. two factors are 3 and 9, so write those. 3 is prime, it's the end of the branch. 9 can be divided by 3 3 times, so two branches out of that with 3 on both ends. the prime factorization of 27 is 3x3x3.