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a display of cereal boxes has one box in the top row, two boxes in second row, three boxes in the third row, and so on, as shown. How many rows of boxes will there be in display of 45 boxes?

User Hongxu
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1 Answer

4 votes
9. 1 + 2 + 3 + 4 + 5 + 6 + 7 + 8 + 9 = 45
User Geoand
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