1、-精品 word 文檔值得下載值得擁有 -南外小升初模擬沖刺試卷1、 An ant covers a distance of 90 metres in 3 hours. The average speed of the ant in decimetres per minute is_.2、3、Ina certaintown some peoplewere affectedby a flu epidemic.In the firstmonth20% of the population contracted the flu whilst 80% were healthy.In the follow

2、ing month 20% of the sick people recovered and 20% of the healthy people contracted the disease.What fraction of the population is healthy at the end of the second month?4、 Mpho, Barry, Sipho, Erica and Fatima are sitting on a park bench.Mpho is not sitting on the far right. Barry is not sitting on

3、the far left.Sipho is not sitting at either end. Erica is sitting to the right of Barry,but not necessarily next to him. Fatima is not sitting next to Sipho.Sipho is not sitting next to Barry.Who is sitting at the far right?5、 Of the 28 T shirts in a drawer, six are red, five are blue, and the rest

4、are white.If Bob selectsT shirtsatrandom whilstpacking for a holiday,whatistheleastnumberhe mustremove from thedrawerto be surethathe has three Tshirtsofthesame colour?6、In an alienlanguage,jalezborg farn means “good maths skills”.Nurf klar borgmeans“maths in harmony ” and darko klar farn means“good

5、 in gold”.What is “harmony gold ” in this language?7、 Five children, Amelia, Bongani, Charles, Devine and Edwina, were in theclassroom when one of them broke a window. The teacher asked each of them to make astatement about the event,knowing thatthreeof them alwayslieand twoalwaystellthetruth. Their

6、 statements were as follows:Amelia:“Charles did not break it, nor did Devine.”-精品 word 文檔值得下載值得擁有 -精品 word 文檔 值得下載值得擁有 -Bongani: “I didn t break it, nor did Devine.”Charles:“I didn t break it, but Edwina did.”Devine:“Amelia or Edwina broke it.”Edwina:“Charles broke it.”Who broke the window?8、 Didyou

7、 know? A palindromeisa number which reads the same forwardsas backwardse.g.35453.Next year 2002 isan example of a palindromicnumber. What is thedifferencebetween2002 and the number of the previous palindromic year?9、If a ?b = (3 ×b) thenthevalueof 2+(2 ×a)?(3?5) is_. 10、 Two ants startatpo

8、intA and walk at the same pace. One ant walks around a 3 cm by 3 cm square whilst the otherwalks around a 6 cm by 3 cmrectangle. What is the minimum distance, in centimetres, any one mustcover before they meet again?參考答案：1、單位換算，注意單詞， 90×10÷（ 3×60） 52、463、0.684、Erica5、抽屜原則 76、注意一一對(duì)應(yīng)， b

9、org= maths, farn=good, jalez=skills. Klar=in, Nurf=harmony,darko=gold. 答案是 Nurf darko.7、Charles8、10019、6710、1081、 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,

10、i.e. 0 and 1.-精品 word 文檔值得下載值得擁有 -精品 word 文檔值得下載值得擁有 -Which one of the following numbers is not a valid number in the octal number system (base 8)?A) 128 B) 127 C) 126 D) 125 E) 1242、The number of diagonals that can be drawn in a regular polygon withtwenty sides (icosagon) is_.3、If a and b are integ

11、ers,10and then 3796 is equal to_.4、 Two numbers are in the ratio2 : 3. When 4 is added to each number the ratiochangesto 5 : 7.The sum of the two original numbers is_.5、 The greatest number of Mondays which can occur in 45 consecutivedays is_6、 Saul playsa videogame in which he scores4 fora hitand l

12、ost6 fora miss.After20 rounds his score is 30. The number of times he has missed is_.7、 Three girls A, B and C run in a 100 m race. When A finishes, B is 10 mbehind A and when B finishes C is 20 m behind B. How far in metres was C from A when Afinished?(Lets assume all the athletes run at a constant

13、 speed)8、 The areasof the facesof a rectangulaboxare 84 cm2 , 70 cm2and 30 cm2.The volumeof the box in cm3is_.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 e

14、ither side參考答案：1、 A 考察我們學(xué)過(guò)的簡(jiǎn)單的進(jìn)制問(wèn)題，顯然8 進(jìn)制中沒(méi)有8 出現(xiàn)2、 170 找規(guī)律，公式為n×（ n-3 ）÷23、 1 定義新運(yùn)算，就是求379÷6的余數(shù)。4、 40， 16 和 245、 76、 57、 28 米，根據(jù)距離比求出速度比，三者的速度比為1： 9/10 ： 18/258、 420 分解質(zhì)因數(shù)9、13 種1. Two numbers differ by 57. Their sum is 185. Find the numbers. Choices for the smaller number:54 64 74.2.A

15、 bus went 318 km farther than a car. The car went one third as far as the bus. How far did each vehicle travel? Choices for the smaller number: 147 151 159-精品 word 文檔值得下載值得擁有 -精品 word 文檔值得下載值得擁有 -3.one number is four times another number. The larger number is also 87 more than the smaller number. Fi

16、nd the numbers. Choices for the smaller number: 29 30 334.A clown weights 60 lb more than a trapeze artist. The trapeze artist weighs two thids as much as the clown. How much does each weigh? choices for the weight of the trapeze artist : 110 120 1255. The U.S. Senate has 100 memebers, all Democrats

17、 or Republicans. Recently there were 12 more Democrats than Republicans. How many Senators from each political party were there at that time? Choices for the number of Republicans: 38 42 446.The ninth grade class has 17 more girls than boys. there are 431 students in all. how many boys are there? ho

18、w many girls are there? Choices for the number of boys: 191 202 2077. Elena has one and a half times as much money as Ramon.Together they have 225. how much money does each have?Choices for Ramom's amount;80 90 958. Western state college is 18 years older than southern state. western is also 2 and the half times as old as southern. how old is each? Choice for southern state's age:12 14 18answers:1. 設(shè)較小數(shù)為 x. x+x+57=185x=64.2.設(shè)轎車(chē)行駛了 x 千米 . 318+x=3xx=15