Ages 8-up. 55 problem cards. 1 parent card. Rounded corners for fast sorting! Answer to the problem on the other side. These flash cards show 110 problems that range from 0 x 0 to 12 x 12. The parent card suggests activities that can help your child develop important math skills and enjoy learning. schoolzone.com. Online Curriculum try it today anywhereteacher.com. Recyclable. Made in Indonesia.