A card that is not

For the execution of this become the focus back to the audience. Ask any of them to draw a card from the deck, put it in his pocket, and shuffle the cards. Then you turn to the audience, take the deck and start to open one card face up, folding them into one pile. When you open all the cards, you call the card that the spectator hid.
The secret of focus is very simple. The numerical value of the missing cards can be found, if you calculate in mind the amount of numerical value cards, which are laid out on the table. The cost of card with glasses: Ace - 1 point, King - 0 points, the lady - 12 points, Jack - 11 points, the other cards in its significance. Without kings the sum of numerical values of the cards in the deck of 52 cards is 312. In order to determine the numerical value of the card that is missing, you need to take away 312 from the sum of numeric values 51 cards. If this sum is equal to 312, it is missing king.