This game evolved from a simple flashcard relay race. I wanted to challenge them by making them think of the factors that make up a number. We are working on fractions so this is helping them with finding the GCF. We played it as a simple relay where we had two rows and two sets of cards. First team done wins. It can be manipulated any way you want though.
This addresses the facts that my students struggled with the most.
The answers are included if you want to print them out and laminate them to the back of the flashcard.