Guessing the number of cards taken from the deck. Effective trick and its solution

EFFECTIVE FOCUSES AND THEIR CLUES
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Guessing the number of cards taken from the deck. Focus Secret

Spectacular tricks and their clues

Directory / Spectacular tricks and their clues

Focus Description:

The magician asks one of the spectators to remove a small pack of cards from the top of the deck, after which he himself also removes the pack, but with a slightly larger number of cards. Then he counts his cards. Let's say there are twenty. Then he declares: "I have four cards more than you, and enough more to count to sixteen." The spectator counts his cards. Let's say there are eleven. Then the artist lays out his cards one at a time on the table, while counting up to eleven. Then, in accordance with his statement, puts four cards aside and continues to lay cards, counting further: 12, 13, 14, 15, 16. The sixteenth card will be the last, as he predicted.

The trick can be repeated over and over again, and the number of cards put aside must be changed all the time, for example, once there can be three, another five, etc. At the same time, it seems incomprehensible how the showman can guess the difference in the number of cards without knowing the number of cards drawn by the spectator.

Focus secret:

In this trick too, you do not need to know the number of cards in the spectator's hand at all, but he must be sure that he has taken more cards than the spectator. The showman counts his cards; in our example there are twenty. Then arbitrarily takes some small number, say four, and subtracts it from 20; it turns out 16. Then the demonstrator says: "I have four cards more than you and that many more to count to sixteen." The cards are recalculated as explained above, and the statement turns out to be true.

Let's assume that the viewer has k cards, the one showing N>k cards; let, further, the number m is chosen

The number m should be chosen small; if m+k is greater than N, then the difference Nk-t will be negative.

Author: M.Gardner

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