小升初英语奥数题

小升初英文奥数题（1）

1、Did you know In the decimal number system (base 10) ten different digits, 0 to 9, are used to write all the numbers. In the binary number system (base 2) two different digits are used, . 0 and 1. Which one of the following numbers is not a valid number in the octal number system (base 8)

你知道吗在十进制数字系统中十个不同的数字，用从0到9就可以写出所有的数字了；在二进制数字系统中使用了二个不同的数字0和1。请问在八进制数字系统中，下列的哪一个数字是不存在的？

A) 128 B) 127 C) 126 D) 125 E) 124

2、The number of diagonals that can be drawn in a regular polygon with twenty sides (icosagon) is_____.

一个规则的20多边形总共可以画出多少条对角线

3、If a and b are integers, 103=1, 1507=3, and then 3796 is equal to_____.

如果a和b都是整数，那么3796是等于多少

4、Two numbers are in the ratio 2 : 3. When 4 is added to each number the ratio changes to 5 : sum of the two original numbers is____.

假设二个数字的比值是2:3，当每个数字加上4以后，比值就变成了5:7。那么这二个数字之和是多少

5、The greatest number of Mondays which can occur in 45 consecutive days is____

在日历中，续45天中最多可以出现多少个星期一

6、Saul plays a video game in which he scores 4 for a hit and lost 6 for a miss. After 20 rounds his score is 30. The number of times he has missed is____.

索尔在玩一个电子游戏，击中一次得4分，打偏则扣6分。20个回合后他的得分是30分，那么他打偏了多少次

7、Three girls A, B and C run in a 100 m race. When A finishes, B is 10 m behind A and when B finishes C is 20 m behind B. How far in metres was C from A when A finished(Let’s assume all the athletes run at a constant speed)

有A,B,C三个女孩进行100米赛跑。当A到达终点时，B落后A 10米，当B 到达终点时，C落后B 20米。那么当A到达终点时，C落后A多少米（假设所有的人都是匀速的）

8、The areas of the faces of a rectangular box are 84 cm2 , 70 cm2and 30 volume of the box in cm3 is____.

一个长方形盒子的表面积依次为84cm2，70 cm2 ，30 cm2，那么这个盒子的体积是多少

9、You have 3 weights: 1 kg, 3 kg and 9 kg as well as an equal arm balance, as shown. How many different weight objects can you weigh with these three[Remember the weights may be placed on either side] 你有三个重物：1kg，3kg，9kg，还有一个等臂天平。那么你可以用这三个重物称多少个不同物体（记得这些重物可以放在天平的任意一边）

小升初英文奥数题（2）

1. An ant covers adistance of 90 metrers in 3 hours .The average speed of the ant in decimetres per minute is____.

一只小蚂蚁用了3个小时爬行了90米，那么它的平均速度是每分钟多少分米

Ancient Romans used the follwing different numerals in their number system as follows:Ⅰ=1 C=100 V=500 Ⅹ=10 M=1000 ,etc L=50 . They used these numerals to make up numbers as follows:Ⅰ=1,Ⅱ=2,Ⅲ=3,Ⅳ=4,Ⅴ=5,Ⅵ=6,Ⅶ=7,Ⅷ=8,Ⅸ=9,Ⅹ= ,for example,XCIX is is the value of XLVI

古罗马人用下面的符号来计数：…….，比如XCIX是99，XLVI等于多少

a certain town some people were affected bya'flu' epidemic .In the first month 20% of the population contracted the ful whilst 80% were the following month 20% of the sick people recovred and the 20% of the healthy people contracted the disease . What fraction of the population is healthy at the end of the healthy month

在某个小镇里一些人感染了流行性感冒。在第一个月里有20%的分感染了，但80%的人是健康的。在接下来一个月里，有20%的病人恢复了健康，但是20%的健康的人也感染了。那么现在总共健康的人数的百分比是多少

,Barry ,Sipho,Erica and Fatima are sitting on a park bench .Mpho is not sitting on the far right. Barry is not sitting on the far left. Sipho is not sitting at either end .Erica si sitting to the right of Barry ,but not necessarily next to him .Fatima is not sitting next to is not sitting next to Barry .Who is sitting at the far right

Mpho,Barry ,Sipho,Erica 和 Fatima坐在公园的长椅上。Mpho坐在不远的右边，