## Seven Coins Puzzle

Draw an {N/D} *star polygon* - a polygon whose N vertices are uniformly distributed on a circle, but are connected by counting the D-th neighbor. Regular polygons correspond to

In the applet the symbol {N/D} appears in the lower right corner. Both numbers can be modified by clicking a little off their center lines. When N and D have a common factor, there are conflicting view points as to whether the configuration of nodes and edges represents a single polygon or a collection of polygons with fewer vertices. However, for the puzzle we shall assume that N and D are mutually prime. In the classical case,

What if applet does not run? |

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