Answer
:
The illustration
shows how the sixteen trees might
have been
planted so
as to form as many as fifteen straight rows with four trees in every
row.
This is in excess
of what was for a long timeelieved
to be the maximum
number of rows possible; and though with our present knowledge I cannot
rigorously demonstrate that fifteen rows cannot be beaten, I have a
strong "pious opinion" that it is the highest number of rows obtainable.
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