2015年第31届美国数学竞赛试卷(MAA AMC 8)
发布:2024/9/7 5:0:8
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1.How many square yards of carpet are required to cover a rectangular floor that is 12 feet long and 9 feet wide?(There are 3 feet in a yard.)( )
要覆盖一个长12英尺、宽9英尺的矩形地面,需要多少平方码的地毯?(1码等于3英尺。)( )组卷:1引用:2难度:0.5 -
2.Point O is the center of the regular octagon ABCDEFGH,and X is the mid-point of side AB.What fraction of the area of the octagon is shaded?( )
点O是正八边形ABCDEFGH的中心,X是边AB的中点。阴影部分占八边形面积比为多少?( )组卷:3引用:2难度:0.5 -
3.Jack and Jill are going swimming at a pool that is one mile from their house.They leave home simultaneously.Jill rides her bicycle to the pool at a constant speed of 10 miles per hour.Jack walks to the pool at a constant speed of 4 miles per hour.How many minutes before Jack does Jill arrive?( )
Jack和Jill要去他们家一英里外的游泳池游泳。他们同时离家出发。Jill骑自行车以每小时10英里的恒定速度到游泳池。Jack以每小时4英里的恒定速度走到游泳池。Jill比Jack早到达多少分钟?( )组卷:5引用:2难度:0.5 -
4.The Centerville Middle School chess team consists of two boys and three girls.A photographer wants to take a picture of the team to appear in the local newspaper.She decides to have them sit in a row with a boy at each end and the three girls in the middle.How many such arrangements are possible?( )
Centerville中学的国际象棋队由两个男孩和三个女孩组成。一名摄影师想为当地报纸拍摄这个团队的照片。她决定让他们坐成一排,两端各坐一个男孩,中间是三个女孩。这样的排列有多少种可能性?( )组卷:11引用:2难度:0.5 -
5.Billy's basketball team scored the following points over the course of the first 11 games of the season:
42,47,53,53,58,58,58,61,64,65,73.
If his team scores 40 in the 12th game,which of the following statistics will show an increase?( )
Billy的篮球队在赛季的前11场比赛中得到了以下分数:
42,47,53,53,58,58,58,61,64,65,73。
如果他的队伍在第12场比赛中得分40,以下哪项统计数据会显示增加?( )组卷:1引用:1难度:0.5 -
6.In△ABC,AB=BC=29,and AC=42.What is the area of△ABC?( )
在△ABC中,AB=BC=29,且AC=42。△ABC的面积是多少?( )组卷:2引用:1难度:0.5 -
7.Each of two boxes contains three chips numbered 1,2,3.A chip is drawn randomly from each box and the numbers on the two chips are multiplied.What is the probability that their product is even?( )
两个盒子中的每一个都包含编号为1,2,3的三个筹码。从每个盒子中随机抽取一个筹码,然后将两个筹码上的数字相乘。他们的乘积是偶数的概率是多少?( )组卷:15引用:2难度:0.5 -
8.What is the smallest whole number larger than the perimeter of any triangle with a side of length 5 and a side of length 19?( )
若一个三角形的两边长分别为5,19,则大于该三角形的周长的最小整数是多少?( )组卷:2引用:2难度:0.8
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24.A baseball league consists of two four-team divisions.Each team plays every other team in its division N games.Each team plays every team in the other division M games with N>2M and M>4.Each team plays a 76 game schedule.How many games does a team play within its own division?( )
一个棒球联盟由两个四队分区组成。每个队伍都会与其分区中的其他队伍进行N场比赛。每个队伍都会与另一个分区中的每个队伍进行M场比赛,其中N>2M且M>4。每个队伍的比赛日程是76场比赛。一个队伍在自己的分区内进行了多少场比赛?( )组卷:3引用:2难度:0.5 -
25.One-inch squares are cut from the corners of this 5 inch square.What is the area in square inches of the largest square that can be fitted into the remaining space?( )
从一个5英寸的正方形的四个角中各切出一个一英寸的小正方形。剩下的空间中可以放入的最大的正方形的面积是多少平方英寸?( )组卷:2引用:1难度:0.5