"Each card represents the number of push-ups to do. A=1, 2=2, 3=3, etc. What I used to do is flip over cards until I reach at least 10 reps (eg. 4 of hearts + 8 of diamonds = 12 reps). Take the same amount of time for rest as your last amount of reps (13 reps, 13 seconds of rest). Take two-minute rest after ¼ deck. Repeat until all cards are done.
If you used Ace as one through King as 13 you will have completed 364 reps! If Ace as 14 you will do 416!
Do the deck thing twice & then finish off with sets of 10 or so using the same principles as with the deck of cards until you've reached 1000 reps.