These G.C.F. (greatest common factor) and L.C.M. (lowest common multiple) pages include two organizers that give students ample opportunity to solve for the G.C.F. and L.C.M. from a pair of numbers and to prove their answers by multiplying the given pair of numbers and the G.C.F. and L.C.M. Both products should be the same if the problems were done correctly. This packet also includes two quizzes to ensure mastery. These two skills should be taught separately before utilizing these pages. The first organizer is included in the preview (along with a glimpse of quiz #1). I also have a different technique for solving for the G.C.F. and L.C.M. that is not discussed in these organizers; however, I am still working on a way to create an organizer for this method that provides the G.C.F. and L.C.M. without doing two different processes.