09月数学试题讨论稿第二篇（41--65）_GMAT数学

　　2. x50

　　51.

　　The toll for crossing a certain bridge is $0.75 each crossing. Drivers who frequently use the bridge may instead

　　purchase a sticker each month for $13.00 and then pay only $0.30 each crossing during that month.

　　If a particular driver will cross the bridge twice on each of x days next month and will not cross the bridge on any other day,

　　what is the least value of x for which this driver can save money by using the sticker?

　　A. 14

　　B. 15

　　C. 16

　　D. 28

　　E. 29

　　SA:B　　　

　　52.那道张三每月收入扣去35%之后是$1300，李四每月收入扣掉25%之后是$1500。问张三的月收入是李四月收入的百分之几

　　SA:100%

　　53. 44 333 - X66, X是下列哪种可能：

　　I. 个位是3

　　II 十位是3

　　III 百位是3

　　A none of the above; B I; C I II 我选B I

　　SA: agree

　　54. .Of the families in City X in 1994, 40 percent owned a personal computer. The number of families in City X

　　owning a computer in 1998 was 30 percent greater than it was in 1994, and the total number of families in

　　City X was 4 percent greater in 1998 than it was in 1994.

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