The Secret of the Nine. Effective trick and its solution

EFFECTIVE FOCUSES AND THEIR CLUES
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The Secret of the Nine. Focus Secret

Spectacular tricks and their clues

Directory / Spectacular tricks and their clues

Focus Description:

There are many number tricks that use some interesting features of the number 9. For example, writing any three-digit number backwards (provided that its first and last digits are different) and subtracting the smaller number from the larger number, we always get a nine in the middle and the sum of the extreme digits, also equal to 9.

This means that you can immediately tell the result of a subtraction, knowing only its first or only the last digit. If you now write the difference in reverse order and add these two numbers, you get 1089.

Focus secret:

One of the popular tricks with numbers is as follows. The number 1089 is written in advance on a piece of paper, which is then turned face down. After the spectator has completed the series of operations described above and announced his final result - 1089, show the prediction you wrote down, holding the sheet upside down. The number written on it will read as 6801, which of course will not be the correct answer.

Make a surprised face, and then apologize for taking the sheet in the wrong way. Rotate it 180° and show the correct number. This little incidental performance adds an entertaining element to the magic trick demonstration.

Author: M.Gardner

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