3 Activities: 1) GFC Game- use the 60 number with factors cards to determine the GFC and battle a friend to see who wins the war! Helps students remember factors of each number and understand GCFs. 2) Cut and paste GFC activity using the 60 number with factor cards for help. 3) Bonus Prime number worksheet included- Find the number cards with only 2 factors (1 and itself). Great hands on activiites for GFC!