2003 AMC 8 第 11 题
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所有题目均经美国数学协会（MAA）官方合法授权使用。
11.
Lou’s Fine Shoes 生意有点慢，于是 Lou 决定促销。星期五，Lou 将星期四所有价格提高 。周末，Lou 做广告：“标价九折，促销星期一开始。”星期四售价 的一双鞋，星期一卖多少钱？
Business is a little slow at Lou’s Fine Shoes, so Lou decides to have a sale. On Friday, Lou increases all of Thursday’s prices by Over the weekend, Lou advertises the sale: “Ten percent off the listed price. Sale starts Monday.” How much does a pair of shoes cost on Monday that cost on Thursday?
答案：B
小提示：
星期一的折扣是从星期五提高后的价格上打折
The Monday discount is taken from Friday’s increased price.
大提示：
将原价先乘以 ，再乘以
Multiply the original price by then by
解答：
星期五鞋价提高 ，所以标价变为 美元。
星期一再打 的折扣，从 降到 美元。
所以正确答案是 B。
On Friday, the shoes are marked up by so the listed price becomes dollars.
On Monday, the discount is taken from giving dollars.
Thus, B is the correct answer.
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