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A grocer stacked oranges in a pile. The bottom layer was rectangular with 3 rows of 5 oranges each. In the second layer from the bottom, each orange rested on 4 oranges from the bottom layer, and in the third layer, each orange rested on 4 oranges from the second layer. Which of the following is the maximum number of oranges that could have been in the third layer?
(A) 5
(B) 4
(C) 3
(D) 2
(E) 1
不知道啥意思啊?
哪位好心人解释解释。万分感激!
商场将橘子堆成一堆,最下面三行,每行5个;从下面数第二层橘子的摆放方式是每个橘子架在4个最下层的橘子上;第三层的每个橘子架在4个第二层的橘子上。问第三层最多摆多少橘子。
画个图吧,就会很清楚了。
最下面的一层有15个橘子,第二层有8个橘子,第三层有3个橘子。
从下面数第二层橘子的摆放方式是每个橘子架在4个最下层的橘子上;第三层的每个橘子架在4个第二层的橘子上。问第三层最多摆多少橘子。
不明白这句话的意思呢?哪位牛人解释下。。谢谢
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