DIRECTIONS: Fill in the blanks in the factor tree presented in the applet. Always fill in the smallest factor to the left and the larger to the right. For instance, if you are factoring 10, enter the 2 in the left blank and the 5 in the right blank. You can move between the blanks by using the arrow keys. When you have filled all the blanks, hit enter to have the applet to check your input.

WARNING: The following factors have identical factor trees and may cause you some problems in this applet:

18: 2,9 or 3,6
12: 2,6 or 3,4
30: 3,10 or 5,6 or 2 15
40: 2,20 or 5,8
36: 4,9 or 6,6