Intermath  Workshop Support 



Title: Map COLORS!
Problem Statement: Find a map of a continent with many countries. Color
the map so that no two bordering countries are the same color. What is the
fewest number of colors needed to completely color a complicated map? Explain
your answer. I thought that Plans to Solve/Investigate the Problem: I printed an outline map of this continent in
order to color it for experimentation.
Investigation/Exploration of the Problem: After experimenting with orange, yellow, and
green, I realized that I needed another color because three would not be
enough. So, I tried blue. Then I had a second thought that if I recolored, I
may be able to use just three colors. So, I went over the original ones with a
different color just using green, yellow and blue—omitting orange.
After several trials, I discovered that I could not use only three colors.
So, I went back to using four and that is the smallest number of colors that
I found one could use in coloring South America. Pam
Joseph 