A man is the owner of a winery who recently passed away. In his will, he left 21 barrels (seven of which are filled with wine, seven of which are half full, and seven of which are empty) to his three sons. However, the wine and barrels must be split so that each son has the same number of full barrels, the same number of half-full barrels, and the same number of empty barrels.( Note that there are no measuring devices handy).
How can the barrels and wine be evenly divided?
The easiest way you can distribute an equal amount of full, half full, and empty barrels, is take two half full barrels and pour each into another 2 other half full barrels. Once this is done, there will be 9 full barrels, 3 half full barrels, and 9 empty barrels, since all these numbers are equally divisible by three that means the barrels can be distributed equally.
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