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A square plot of land contains 150 trees . The owner wants to divide the land using fences, such that each section contains at most 12 trees. If all the fences are straight line segments of any length, then what is the least number of fences that are guaranteed to be required?

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#### Puzzle No. 9

*Posted on 26 February 2016*A square plot of land contains 150 trees . The owner wants to divide the land using fences, such that each section contains at most 12 trees. If all the fences are straight line segments of any length, then what is the least number of fences that are guaranteed to be required?

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