If you are still unsure, call the customer service number on your card or log in to your online account to see when your next payment is due. (discover.com)
Each suit corresponds to a different exercise, and number on the cards indicates how many reps of that exercise you'll do. (pumpsandiron.com)
For instance, one game the children played allowed them to estimate numbers on cards and sort the cards on that basis. (sciencedaily.com)