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6 piles of marbles are arranged in a triangle pattern. Each side of the triangle has a total of 9 marbles. Add 1 more marble to one of the piles, so that the total number of marbles on each side remains 9. You are allowed to move the marbles but not take any out.

6 piles of marbles are arranged in a triangle pattern Each side of the triangle has a total of 9 marbles Add 1 more marble to one of the piles so that the total class=

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StrawberryOwl
I would place the additional marble in the middle of the triangle.

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