Coloring the Plane with a Rolling Cube
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The faces of a cube are colored green, brown, blue, black, yellow, and red. (At the start in the bottom left-hand corner, the bottom color is red.) The cube rolls on its edges from one square to another in the grid, coloring a square according to the color of the face of the cube that lands on it. What is the color of the last square?
Contributed by: Izidor Hafner (March 2013)
Open content licensed under CC BY-NC-SA
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