Contrary to the popular belief most numerical playing cards are different depending on wich direction they are pointing, with the exeption of the diamonds due to the nature of the shape of the diamonds, but even there it's possible to locate the direction that the 7 of diamond is pointing by locating what I call the 5 rows versus the 4 rows. As for the other numerical suits it's possible to identify wich side the card is by looking at the suit in the middle row, however their is 3 exeptions, the 2's, 4 and 10's, them, unless they are marked it's impossible to tell if the card is in the "right" position or "upside down".