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\title{Math 251-02/03 Homework 10}

\begin{document}

\maketitle

Rough drafts due 4/16/12, edits due 4/18/12, final drafts due 4/20/12.\\


\textbf{Problems to Turn in:}

\begin{enumerate}
\item \textbf{6.3.1 (1,6)}
\item \textbf{6.3.3}
\item \textbf{6.3.8}
\item \textbf{6.3.9}
\item \textbf{6.3.11}

\item A {\bf triomino} \index{triomino} is an L-shaped figure made up of three congruent squares (each one unit on a side).  Show that if
a chessboard is $2^n\times 2^n$ for some $n\in \N,$ then the chessboard can be tiled by triominos if one corner square of the chessboardis
removed.  (``Tiling'' means that you may not cut or overlap triominos, and none may hang over the edge.)

\cpict{1}{1}{triomino}

\end{enumerate}

\textbf{Problems to Keep:}

\begin{enumerate}
\item \textbf{6.3.1 (2,3)}
\item \textbf{6.3.2}
\item \textbf{6.3.3}
\item \textbf{6.3.6}
\item \textbf{6.3.12}
\end{enumerate}


\end{document} 