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\begin{document}


\begin{center}
{\Large Puzzle 6}

Mindreading
\end{center}

\bigskip

Instructions:

\bigskip 

\begin{enumerate}
\item Think of a 5-6 digit number, that has at least two different digits in
it. My example is $803225$.

\item Create a second number by rearranging the digits of the previous
number. My example is $320258$.

\item Subtract the smaller number from the larger number.   My example is $%
803225-320258=\allowbreak 482\,967$

\item Cross out any non-zero digit of the difference. My example is $482\,9%
\NEG{6}7$.

\item Announce the number you obtain by omitting the crossed out digit. My
example is $482\,97$.
\end{enumerate}

\bigskip 

If you tell the mindreader the last number, s/he can tell what digit you've
crossed out. How?

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