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Problem of the Week 1122
Consider a 4 × 4 grid of squares to be viewed as a crossword puzzle with four words across and four words down.
In alphabetical order, seven of the eight words are: MPMM, OMPM, OMPP, OOMO, OOMP, POOM, and POPM.
What is the eighth word??
Source: The Joe Konhauser collection. A box of Joe's problems that had been missing for over ten years just miraculously showed up in a classroom!
© Copyright 2009 Stan Wagon. Reproduced with permission.
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