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Wednesday, July 23, 2008

Ten Trees

Joyce has bought ten trees for her garden. She wants to plant these trees in five rows, with four trees in each row.

First Question: How must Joyce plant the trees?

Second Question: Joyce's neighbour George has bought nine trees for his garden. How can he plant these nine trees in ten rows, with three trees in each row?

First Answer: The trees must be planted on the edges of a five pointed star:




Second Answer: The nine trees must be planted as follows:



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