If I pile oranges in a pyramid with 1 orange in the first layer, 4 in the second layer (from the top), 9 in the third layer and 16 in the fourth layer, how many oranges will I need to make to make a pile with 10 layers?
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the lenth of a rectangular filed is 8m less than twice breadth . if the perimeter of rectangular filed is 56 meters, find is length and breadth?
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