The "Twenty-Six" Puzzle

 

after Professor Louis Hoffman

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The object of the puzzle is to place in the cross above the numbers 1 through 12 - exactly one number per cell - so that to make the magic sum of 26 in seven areas of the cross containing four cells each: 
-- in two horizontal and two vertical rows as pointed by respective arrows in the left illustration;
-- in the three groups of squares - marked a-a-a-a, b-b-b-b, and c-c-c-c, respective - all as shown in the illustration above right.

You may draw the grid by yourself or use our
Print 'n' Play PDF Version.

 
Last Updated: January 21, 2008  |  Posted: July 14, 2001
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