新东方小编在此与大家分享新GRE OG中与新GRE数学的相关内容，希望各位在2015年能够搞定GRE数学真题。

　　21.The total amount that Mary paid for a book was equal to the price of the book plus a sales tax that was 4 percent of the price of the book. Mary paid for the book with a $10 bill and received the correct change, which was less than $3.00. Which of the following statements must be true?

　　Indicate all such statements.

　　A The price of the book was less than $9.50.

　　B The price of the book was greater than $6.90.

　　C The sales tax was less than $0.45.

　　如果设书的价格是x，那么总的支出是1.04x，根据题意有(10-3)<1.04x<10,解得6.73

　　更多关于GRE数学真题的内容，请关注新东方网GRE频道，也可通过下方二维码关注我们的微信平台(微信号：GRE-XDF)。

微信号：GRE-XDF

(编辑：马荟)