as 3 is not a factor of 25. We must again look for a larger prime number to use. The next prime number in the list is 5: Finally we can divide by 5 again, leaving 1: When we have a 1 in the left ...

Refresh your knowledge with these guides on factor trees and writing numbers as a product of prime factors. List the factors of each number. Compare the lists to find the greatest number common to ...