## Solution to Andy Naughton's trick

First of all, what I’ve wrote about it that it can read your mind was a joke (this is if you’re directed to here from AUC group or __http://kif-caliph.spaces.live.com__ . The solution is so simple, as it doesn’t know what is the number you choose. It is just direct you to a number already known. The calculations you do over any number you choose (from 10 to 99) will result the following numbers (**9, 18, 27, 36, 45, 54, 63, 72, 81**). If go back to check the chart of numbers and symbols, you can find they are same and change at each round in order to confuse you. The following equation explains it:

**(A × 10 + B) – (A + B) = 9A**

Where (A) is the first digit and (B) is the second digit. As you know, we can represent the decimal numbers as [33 = (3 ×10) + (3)]. This means whatever (B) you choose, your answer can only be one of the following 9 numbers which is 9A [ **9×1=9; 9×2=18; 9×3=27; 9×4=36; 9×5=45; 9×6=54; 9×7=63; 9×8=72; 9×9=81** ].

Finally we say mathematics is a language.

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