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A lumberman stacks planks of wood, starting with 30 planks in a row. Each row he stacks has one less plank than the row below it. The last row he stacks has 15 planks. How many rows of planks has he stacked?
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Apr 25, 2017
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A lumberman stacks planks of wood, starting with 30 planks in a row. Each row he stacks has one less plank than the row below it. The last row he stacks has 15 planks. How many rows of planks has he stacked?
12
15
16
18
Mathematics
high-school
DanielTheRocketMan
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I would say 15. If i am wrong i take full credit.
Aloso
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Apr 30, 2017
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Aloso
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