Guessing the intended number on the dial. Effective trick and its solution

EFFECTIVE FOCUSES AND THEIR CLUES
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Guessing the intended number on the dial. Focus secret

Spectacular tricks and their clues

Directory / Spectacular tricks and their clues

Focus Description:

The spectator thinks of some number from 1 to 12. The magician begins to touch the numbers on the dial with the tip of a pencil, doing this, apparently, in a completely random order.

At this time, the viewer counts to himself, starting from the intended number to twenty, and so that for each touch of the pointer to the clock there is one number. Having reached 20, he says “stop”. And (strange coincidence!) the pencil ends up at that moment exactly on the intended number.

Focus secret:

The first eight touches are really done completely at random. However, already at the ninth, the one showing must necessarily touch 12 and from that moment go through the hours strictly in a row in the direction opposite to the movement of the hour hands. When the viewer says the word "stop", the tip of the pencil will point to the required number.

If the viewer thinks of k, then until twelve there are 12-k, or 20-8-k, which is counted by the one showing.

It is not at all necessary to ask the viewer to stop counting exactly at 20; you can invite him to choose the number to end the count: you just need it to be greater than 12. Of course, the viewer must warn you at what number he is going to stop. Subtract 12 from this number, and the resulting remainder will indicate how many touches must be made at random before touching 12 and starting to move sequentially counterclockwise.

Author: M.Gardner

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