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Puzzle 13. ARRAY ARRANGEMENT |
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This problem had been studied by Euler. Rearrange the colored letters below so that each row or column will have four distinct letters having four different colors.
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SPIRALS Spirals come in various forms. They may be logarithmic, equiangular, geometrical, or rectangular spirals. A lot of natural phenomena or objects manifest spiral properties. These includes shells, tornadoes, hurricanes, and galaxies.
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