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  2. Twenty-One Card Trick - Wikipedia

    en.wikipedia.org/wiki/Twenty-One_Card_Trick

    After three steps, the middle card (*) is the one in all chosen piles. The Twenty-One Card Trick, also known as the 11th card trick or three column trick, is a simple self-working card trick that uses basic mathematics to reveal the user's selected card. The game uses a selection of 21 cards out of a standard deck. These are shuffled and the ...

  3. Self-working magic - Wikipedia

    en.wikipedia.org/wiki/Self-working_magic

    The illusionist sums the first number on each card on which the target number appears. In the SVG file, click a card to toggle it.. Self-working magic is a commonly used term in magic to refer to tricks that work simply from following a fixed procedure, rather than relying on trickery, sleight-of-hand, or other hidden moves.

  4. Si Stebbins stack - Wikipedia

    en.wikipedia.org/wiki/Si_Stebbins_stack

    The value of a card selected from a deck in Si Stebbins order can be determined by the card immediately preceding or following it. In Card Tricks And The Way They Are Performed Stebbins instructs the performer to have a card selected and cut the cards above the selection to the bottom of the deck. Then, by looking at the bottom card, the ...

  5. Out of This World (card trick) - Wikipedia

    en.wikipedia.org/wiki/Out_of_This_World_(card_trick)

    The performer takes a deck of cards, and places on the table two face-up "marker" cards, one black and one red; the black on the left and the red on the right.The performer tells the spectator that he or she is going to deal cards face-down from the deck and the object of the exercise is for the subject to use their intuition to identify whether each card in the deck is black or red.

  6. Blackstone's Card Trick Without Cards - Wikipedia

    en.wikipedia.org/wiki/Blackstone's_Card_Trick...

    Take the card's face value (with aces counting as 1 and royal cards counting as 11, 12 and 13 respectively) Double it. Add 3. Multiply by 5. If the card the spectator is thinking of is a spade, subtract 1. If the card the spectator is thinking of is a heart, subtract 2. If the card the spectator is thinking of is a club, subtract 3.

  7. VirtualBox - Wikipedia

    en.wikipedia.org/wiki/VirtualBox

    Windows 10 64-bit and higher. Support for 64-bit Windows was added with VirtualBox 1.5. Support for 32-bit Windows was removed in 6.0. Support for Windows 2000 was removed in version 1.6. [76] [77] Support for Windows XP was removed in version 5.0. [78] [79] Support for Windows Vista was removed in version 5.2.

  8. List of Martin Gardner Mathematical Games columns - Wikipedia

    en.wikipedia.org/wiki/List_of_Martin_Gardner...

    The tyranny of 10 overthrown with the ternary number system: 1964 Jun: A collection of short problems and more talk of prime numbers: 1964 Jul: Curious properties of a cycloid curve 1964 Aug: Concerning several magic tricks based on mathematical principles 1964 Sep: Puns, palindromes and other word games that partake of the mathematical spirit ...

  9. Kruskal count - Wikipedia

    en.wikipedia.org/wiki/Kruskal_count

    The magician has no access to the cards, which are manipulated by members of the audience. Thus sleight of hand is not possible. Rather the effect is based on the mathematical fact that the output of a Markov chain , under certain conditions, is typically independent of the input.