AMC 8 2003 Problem 7
AMC8 2003 年第 7 题
表达式与运算★★☆☆☆
Blake and Jenny each took four 100 -point tests. Blake averaged 78 on the four tests. Jenny scored 10 points higher than Blake on the first test, 10 points lower than him on the second test, and 20 points higher on both the third and fourth tests. What is the difference between Jenny's average and Blake's average on these four tests?
和 Jenny 每人参加了四次满分为 100 分的测验。Blake 在四次测试中平均得分为 78 分。 Jenny 在第一次测试中比 Blake 高 10 分，在第二次测试中比他低 10 分，在第三次和第四次测试中都比他高 20 分。那么 Jenny 和 Blake 在这四项测试中的平均分的差是多少？ Problem 8 烘烤物售卖 (Problems 8, 9, and 10 use the data found in the accompanying paragraph and figures) （第 8、9 和 10 题使用文中和图中的数据） Four friends, Art, Roger, Paul and Trisha, bake cookies, and all cookies have the same thickness. The shapes of the cookies differ, as shown. 四个朋友，Art，Roger，Paul 和 Trisha 烤饼干，所有的饼干都有相同的厚度。饼干的形状不同，如图所示。 Art's cookies are trapezoids. Roger's cookies are rectangles. Paul's cookies are parallelograms. Trisha's cookies are triangles. Each friend uses the same amount of dough, and Art makes exactly 12 cookies. Who gets the fewest cookies from one batch of cookie dough? 每个朋友都用了等量的面团，Art 正好做了 12 块饼干。谁用这批饼干面团做的饼干数最少？ Problem 9 Each friend uses the same amount of dough, and Art makes exactly cookies. Art's cookies sell for cents each. To earn the same amount from a single batch, how much should one of Roger's cookies cost in cents? 每个朋友都用了等量的面团，Art 正好做了 12 块饼干。Art 的饼干每个卖 60 美分。为了从这批面团赚得同样的钱，那么 Roger 的饼干应该每个卖多少美分？
- A.}10 \qquad\mathrm{(B)}15 \qquad\mathrm{(C)}20 \qquad\mathrm{(D)}25 \qquad\mathrm{(E)}40$
正确答案 · Correct Answer
A
解析 · Solution
解析整理中
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