CSUCI Tower

Magically Without a doubt
(Author Jorge Garcia)

   Description

You make piles, ask the spectator to select, switch and TURN OVER three of them while you turn around. A spectator takes the card at the top of a pile and you give the value of the card. You repeat with the two left piles. Spectator will believe you are a psychic, but you are a cool math guy.
This trick is based on math, more precisely, binary representation, the one that computers use. You have to learn it fast and easy now. If you are a math major or computer major or a math guy, skip the learning key.

   Learning Key

Consider cards with values 1,2,4 and 8.

How do you build value 13 out of these cards?

Need: 1-card, NO 2-card, 4-card and 8-card. (13=1+4+8).
Here is another example.

How do you build value 10 out of these cards?

Need: NO 1-card, 2-card, NO 4-card, 8-card. (10=2+8).
Here is a final example.

How do you build value 7 out of these cards?

Need: 1-card, 2-card, 4-card. (7=1+2+4). You are ready!!!!!!!!

   Set Up

Ask spectator shuffle the cards, then you take them facing up.

Here is an example

If the first card is a King, for example, (a king has value 13), you put it on the table facing up.
  1. Now take the next card on the pile of your hand and put it on the top of the king facing down (that means a 1).
  2. Now take the next card on the pile of your hand and put it on the top of the previous card facing up (that means NO 2).
  3. Now take the next card on the pile of your hand and put it on the top of the previous card facing down (that means a 4).
  4. Now take the next card on the pile of your hand and put it on the top of the previous card facing down (that means an 8).
(13=1+4+8) You finished making the first pile!

Here is one more example.

Take the next card on the pile of your hand and put it on the table facing up, so you know its value. Suppose for example that it is a 10. You continue doing the previous process with this pile, i.e.
  1. A card facing up on the top of the 10 (it means NO 1),
  2. A card facing down on the top of the previous one (it means a 2)
  3. A card facing up on the top of the previous one (it means NO 4)
  4. A card facing down on the top of the previous one (it means an 8).
That is your second pile!

Here is the last example so you catch it!

Take the next card on the pile of your hand and put it on the table facing up, so you know its value. Suppose for example that it is a 7. You continue doing the previous process with this pile, i.e.
  1. A card facing down on the top of the 7 (it means a 1),
  2. A card facing down on the top of the previous one (it means a 2)
  3. A card facing down on the top of the previous one (it means a 4)
That is your third pile, and so on.
You can keep doing as many piles until all your cards are gone or you do not have enough cards to build the value of the last card.
Follow the description of the trick at the beginning of the page.

   How You Finish it

Now, when the spectator, takes the top card of a pile, you TURN OVER that pile and read the cards as follows. If the bottom of that pile is facing up, there is NO 1, if the next card at the bottom is facing up, there is NO 2, if the next card at the bottom is facing down, there is a 4, if the next card at the bottom is facing down, there is an 8. If there are no cards left in that pile, then the value of the card the spectator has is 4+8=12, It is a Queen without a doubt!

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