You can put this solution on YOUR website! To start making this (factor tree) you want to pick and two numbers that multiply to make 110. The two numbers I picked are 55 and 2. Since 2 is a prime number I do not have to break it down any further (a good idea is to circle it so you dont forget it.) Then I broke down 55 into 11 and 5. 11 and 5 are both prime numbers so they do not need to be broken down any further.(circle them). Now when there are no more numbers to break down. Express the answer as a product of prime numbers.