This deck of I Have Who has contains 20 cards to play. I laminate mine and then have my students figure out what their number that they got is divisible by and write it on the card using dry-erase marker so that they are ready for their turn. The set of 20 contains numbers that are divisible by a variety of numbers and that students can apply divisibility rules to for numbers 2, 3, 4, 5, 6, 9, and 10.The best part- it is Harry Potter themed thanks to the awesome clip art from Alefclipart found o