Self-writing marks. Effective trick and its solution

EFFECTIVE FOCUSES AND THEIR CLUES
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Self-writing marks. Focus Secret

Spectacular tricks and their clues

Directory / Spectacular tricks and their clues

Focus Description:

Show the audience a black slate. Write the number "2" on the left side of it with chalk. After it, a "+" sign will be written by itself. Behind the "+" sign, write another number 2. Following it, like the "+" sign, the "=" sign will be written by itself. It remains to write the number 4 in small letters on the right.

Focus secret:

Especially the effect of the focus lies in the "self-writing" signs "+" and "=". This is done using paper strips glued together with rings and enveloping both sides of the slate board. The board itself can be made of thick cardboard or plywood. In it, in appropriate places, there are slots through which pieces of paper pass. The halves of the paper rings are painted board black, while the other halves are white as chalk.

At first, the stripes are located with the black side, like the board itself, towards the audience. After writing the first number, hold the board from below with a hand with chalk, and with the other hand, from the back of the board, move the strips with the white part towards the audience. It will seem that the "+" sign is self-written. Hold the board again with your left hand, and write the second number with your right hand. Demonstrate the self-writing sign "=" in the same way. Then write the result - the last digit.

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