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Tree planting exercise (Posted on 2006-10-21) Difficulty: 3 of 5
How can you plant seven straight rows of trees with six trees per row such that twenty-one trees are planted in total?

How can you plant nine straight rows of trees with three trees per row such that nine trees are planted in total?

See The Solution Submitted by JLo    
Rating: 2.0000 (2 votes)

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Solution? | Comment 1 of 11
I doubt this is a valid solution, but with only 12 trees, we could make 2 larger rows:

1 2 3 4 5 6 7 8 9 10 11 12

Creating 7 rows of 6 trees (1,2,3,4,5,6 ; 2,3,4,5,6,7 ; 3,4,5,6,7,8 ; etc...)

The same technique cannot be applied to the second question however.

  Posted by George on 2006-10-21 16:02:03
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