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2014年第30届美国数学竞赛试卷(MAA AMC 8)

发布:2024/9/7 6:0:11

一、选择题。

  • 1.Harry and Terry are each told to calculate 8-(2+5).Harry gets the correct answer.Terry ignores the parentheses and calculates 8-2+5.If Harry's answer is H and Terry's answer is T,what is H-T?(  )
    Harry和Terry都被告知计算8-(2+5)。Harry得到了正确的答案。Terry忽略了括号,计算了8-2+5。如果Harry的答案是H,Terry的答案是T,那么H-T是多少?(  )

       
    组卷:3引用:1难度:0.8
  • 2.Paul owes Paula 35 cents and has a pocket full of 5-cent coins,10-cent coins,and 25-cent coins that he can use to pay her.What is the difference between the largest and the smallest number of coins he can use to pay her?(  )
    Paul欠Paula 35美分,他的口袋里装满了5美分、10美分和25美分的硬币,他可以用这些硬币来还她。他还她的硬币数量的最大值和最小值之间的差异是多少?(  )

       
    组卷:3引用:1难度:0.5
  • 3.Isabella had a week to read a book for a school assignment.She read an average of 36 pages per day for the first three days and an average of 44 pages per day for the next three days.She then finished the book by reading 10 pages on the last day.How many pages were in the book?(  )
    Isabella学校作业是一个星期读完一本书。她在前三天平均每天读了36页,接下来的三天平均每天读了44页。然后,她在最后一天读了10页并读完了这本书。这本书有多少页?(  )

       
    组卷:7引用:1难度:0.5
  • 4.The sum of two prime numbers is 85.What is the product of these two prime numbers?(  )
    两个质数的和是85。这两个质数的乘积是多少?(  )

       
    组卷:8引用:1难度:0.8
  • 5.Margie's car can go 32 miles on a gallon of gas,and gas currently costs 4pergallon.HowmanymilescanMargiedriveon20 worth of gas?(  )
    Margie的汽车每加仑油可以行驶32英里,现在的汽油价格是每加仑4美元。Margie有$20美元的汽油,这些可以行驶多少英里?(  )

       
    组卷:1引用:1难度:0.8
  • 6.Six rectangles each with a common base width of 2 have lengths of 1,4,9,16,25,and 36.What is the sum of the areas of the six rectangles?(  )
    六个矩形都有一个公共的底边宽度为2,它们的长度分别为1、4、9、16、25和36。这六个矩形的面积总和是多少?(  )

       
    组卷:2引用:1难度:0.5
  • 7.There are four more girls than boys in Ms.Raub's class of 28 students.What is the ratio of the number of girls to the number of boys in her class?(  )
    在Raub老师的班级中,共有28名学生,其中女生比男生多4人。她班级中女生和男生的比例是多少?(  )

       
    组卷:9引用:1难度:0.5
  • 8.Eleven members of the Middle School Math Club each paid the same amount for a guest speaker to talk about problem solving at their math club meeting.They paid their guest speaker $1A2.What is the missing digit A of this 3-digit number?(  )
    中学数学俱乐部的11名成员为请一位嘉宾讲解他们数学俱乐部会议中的问题的解决方法而支付了相同的金额。他们支付给嘉宾讲者的费用是$1A2。这个3位数中缺失的数字A是多少?(  )

       
    组卷:1引用:1难度:0.5

一、选择题。

  • 24.One day the Beverage Barn sold 252 cans of soda to 100 customers,and every customer bought at least one can of soda.What is the maximum possible median number of cans of soda bought per customer on that day?(  )
    某天,Beverage Barn售出了252罐汽水给100名顾客,每位顾客至少买了一罐汽水。那天每位顾客购买的汽水数量的中位数最大可能是多少?(  )

       
    组卷:2引用:1难度:0.5
  • 25.A straight one-mile stretch of highway,40 feet wide,is closed.Robert rides his bike on a path composed of semicircles as shown.If he rides at 5 miles per hour,how many hours will it take to cover the one-mile stretch?(  )
    Note:1 mile=5280 feet
    一段直线的公路,长一英里、宽40英尺,被封闭了。Robert骑自行车走的路线是由如图所示的半圆组成的。如果他以5英里每小时的速度骑行,他需要多少小时才能走完这一英里的路段?(  )
    注:1英里=5280英尺。

    组卷:3引用:1难度:0.5
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