Making Prime Factorization, Multiples and Factors Fun!

We wrapped up our lesson on Factors, Multiples, and Prime Factorization a few days ago.  To wrap up a new concept, we usually play a game of some sort.  For these concepts I took out my decks of cards.

Grade 7s:  The partners would flip two cards.  They were instructed to find the product of the two numbers.  They were then instructed to find the factors of the number.  They were instructed to repeat the process with two new cards.  From there they were instructed to find the common factors and GCF, and the LCM.

Grade 8s.  They were instructed to flip three cards and find the product of all three.  From there they were instructed to find the prime factorization of the number.