小升初英语奥数题
小升初英语数学竞赛策略单选题40题
小升初英语数学竞赛策略单选题40题1.In a math competition, you need to “work out” a problem. What does “work out” mean?A.find outB.put outC.take outD.give out答案：A。
“work out”在这里表示“解决、算出”，A 选项“find out”有“找出、查明”的意思，与“work out”在这个语境中的意思相近；B 选项“put out”是“熄灭、出版”的意思；C 选项“take out”是“取出、拿出”的意思；D 选项“give out”是“分发、发出”的意思。
2.If you want to know the “total number” of something in a math competition, which expression can you use?A.all numberB.whole numberC.sum numberD.total amount答案：B。
“total number”表示“总数”，B 选项“whole number”有“整数、总数”的意思；A 选项“all number”表达不准确；C 选项“sum number”搭配不当；D 选项“total amount”通常用于不可数名词的总数。
3.In a math competition, you are given a problem that says “divide 24 by 6”. What is the answer?A.3B.4C.5D.6答案：B。
“divide 24 by 6”意思是“24 除以6”，结果是4。
4.When you see the word “product” in a math competition problem, what does it mean?A.additionB.subtractionC.multiplicationD.division答案：C。
外国语学校小升初入学考试中英文奥数试题库
外国语学校小升初入学考试中英文奥数试题库Document number：PBGCG-0857-BTDO-0089-PTT1998外国语学校小升初英语奥数训练题第一部分1、三个素数的倒数之和是20061155，则这三个素数中最大的是多少 1. The sum of the reciprocals of three prime numbers is 20061155, so what is the greatest one among the three prime numbers2、有一个分数，它的分子加2，可以约简为74；它的分母减2，可以约简为2514。
这个分数是多少 2. There is a fraction. If its numerator adds 2, it can be reduced to be 74; if its denominator subtracts 2, it can be reduced to be 2514. So what is this fraction 3、一个数分别除以1411，2110，4920，所得的商都是自然数。
这个数最小是多少 3. A number is divided by 1411, 2110 and 4920 respectively and the quotients are all natural numbers. So what is the minimum value of this number 4、一片竹林，去年不开花的竹子比开花的2倍还多55棵，今年又多了100棵开花，这时开花的竹子恰好是不开花的4倍，这片竹林有多少棵竹子4. There is a bamboo forest. Last year, the non-blooming bamboos were two times and 55 more than the blooming bamboos. With another 100 bamboos blooming this year, the blooming bamboos are four times as many as the non-blooming bamboos. So, how many bamboos are there in this forest（红色的地方我有点不确定，葛老师您看看应该怎么翻）5、从12110181614121+++++中去掉两个分数，余下的分数之和为1。
小升初英语数学竞赛策略单选题40题
小升初英语数学竞赛策略单选题40题1. What is the sum of 5 and 7? A. 12. B. 13. C. 14. Answer: A. The sum of 5 and 7 is 5+7=12.2. If there are 8 apples and you take away 3, how many apples are left?A. 5.B. 6.C. 7. Answer: A. 8 apples take away 3 apples leaves 8 - 3 = 5 apples.3. What is 10 divided by 2? A.4. B.5. C.6. Answer: B. 10 divided by 2 is 10÷2=5.4. Double of 6 is what number? A. 12. B. 13. C. 14. Answer: A. Double of 6 is 2×6=12.5. The difference between 9 and 4 is what? A. 5. B.6. C.7. Answer:A. The difference between 9 and 4 is 9 - 4 = 5.6. What shape has four equal sides and four right angles?Answer: A square. A square has four equal sides and four right angles..7. Which shape has three sides?Answer: A triangle. A triangle is a shape with three sides..8. A rectangle has two pairs of equal sides and four right angles. True or False?Answer: True. A rectangle indeed has two pairs of equal sides and four right angles..9. What is the English word for a shape with five sides?Answer: Pentagon. The word for a shape with five sides is pentagon..10. How many sides does a hexagon have?Answer: Six. A hexagon has six sides..11. What day is it two days after Wednesday?Answer: Friday. Explanation: Wednesday + two days = Friday.12. If today is May 10th, what was the date a week ago?Answer: May 3rd. Explanation: 10th - 7 days = 3rd.13. How many months are there in a year?Answer: Twelve. Explanation: There are twelve months in a year.14. What is the date of Christmas Day?Answer: December 25th. Explanation: Christmas Day is on December 25th.15. In which month does summer vacation usually start in many schools?Answer: July. Explanation: Summer vacation usually starts in July in many schools.16. A box is 50 centimeters long. How many meters is it? A. 0.5 meters.B. 5 meters.C. 50 meters. Answer: A. A centimeter is one hundredth of ameter. So 50 centimeters is 50/100 = 0.5 meters.17. 1 kilometer is equal to how many meters? A. 10 meters. B. 100 meters. C. 1000 meters. Answer: C. 1 kilometer is equal to 1000 meters.18. A jug contains 2 liters of water. How many milliliters is it? A. 200 milliliters. B. 2000 milliliters. C. 20 milliliters. Answer: B. 1 liter is equal to 1000 milliliters. So 2 liters is 2 * 1000 = 2000 milliliters.19. A book is 200 grams. How many kilograms is it? A. 0.2 kilograms.B. 2 kilograms.C. 20 kilograms. Answer: A. 1 kilogram is equal to 1000 grams. So 200 grams is 200/1000 = 0.2 kilograms.20. 1 ton is equal to how many kilograms? A. 100 kilograms. B. 1000 kilograms. C. 10 kilograms. Answer: B. 1 ton is equal to 1000 kilograms.21. A box contains red and blue marbles in the ratio of 3:5. If there are 24 blue marbles, how many red marbles are there?Answer: Since the ratio of red to blue marbles is 3:5 and there are 24 blue marbles. Let the number of red marbles be x. Then 3/5 = x/24. Solving this equation gives x = (3/5) * 24 = 14.4, which is not possible as the number of marbles must be a whole number. There seems to be an error in the question or calculation. If we assume that the ratio is 3:4 instead of 3:5, then solving 3/4 = x/24 gives x = 18. So, there is likely an error in the question.22. What is 3/4 of 20?Answer: To find 3/4 of 20, we multiply 20 by 3/4. 20 * (3/4) = 15.23. If a class has 30 students and 2/5 of them are girls, how many boys are there?Answer: First find the number of girls. 2/5 of 30 is (2/5) * 30 = 12. So the number of boys is 30 - 12 = 18.24. The ratio of apples to oranges in a basket is 4:3. If there are 12 oranges, how many apples are there?Answer: Since the ratio of apples to oranges is 4:3 and there are 12 oranges. Let the number of apples be x. Then 4/3 = x/12. Solving this equation gives x = (4/3) * 12 = 16.25. What is the fraction equivalent of 0.6?Answer: 0.6 is equal to 6/10 which simplifies to 3/5.26. Tom has 5 apples. He gives 2 apples to Jerry. How many apples does Tom have now?Answer: Tom had 5 apples and gave away 2. So he has 5 - 2 = 3 apples now. The answer is 3.27. There are 10 pencils in a box. If 3 pencils are taken out, how many pencils are left in the box?Answer: There were 10 pencils and 3 were taken out. So 10 - 3 = 7 pencils are left. The answer is 7.28. Mary has 8 books. She buys 4 more books. How many books does she have in total?Answer: Mary had 8 books and bought 4 more. So 8 + 4 = 12 booksin total. The answer is 12.29. There are 12 students in a class. 6 students are boys. How many students are girls?Answer: There are 12 students in total and 6 are boys. So 12 - 6 = 6 students are girls. The answer is 6.30. A bag has 7 red balls and 3 blue balls. How many balls are there in total?Answer: There are 7 red balls and 3 blue balls. So 7 + 3 = 10 balls in total. The answer is 10.31. What is the result of rotating a square 90 degrees clockwise?Answer: The square will still be a square but with different orientation. Rotating a square 90 degrees clockwise changes its position but not its shape.32. If a rectangle is reflected over a horizontal line, which of the following remains the same?Answer: The length and width of the rectangle remain the same. Reflection only changes the position of the shape.33. When a triangle is translated to the right by 5 units, what changes?Answer: The position of the triangle changes. Translation moves the shape without changing its size or shape.34. What happens to a circle when it is enlarged by a scale factor of 2?Answer: The radius and diameter of the circle are doubled. Enlarginga circle by a scale factor changes its size.35. If a pentagon is rotated 180 degrees counterclockwise, what is the result?Answer: The pentagon will be in a different orientation but still a pentagon. Rotation changes the position of the shape.36. There are three boxes, one contains only apples, one contains only oranges, and one contains both apples and oranges. The labels on the boxes are all wrong. You can only open one box and look at one fruit. Which box should you open to determine the correct contents of all the boxes?Answer: Open the box labeled “apples and oranges”. If you find an apple inside, then this box must contain only apples. Since the labels are all wrong, the box labeled “oranges” must contain both apples and oranges, and the box labeled “apples” must contain only oranges. If you find an orange inside, the reasoning is similar.!.37. Tom is taller than Jerry. Jerry is shorter than Lucy. Lucy is shorter than Lily. Who is the shortest?Answer: Jerry is the shortest. Tom is taller than Jerry. Jerry is shorter than Lucy and Lucy is shorter than Lily.!.38. In a group of three people, A, B, and C. A is taller than B. C is shorter than B. Who is the tallest?Answer: A is the tallest. A is taller than B and C is shorter than B. SoA is taller than bothB and C.!.39. There are four books on a shelf. Book A is to the left of Book B. Book C is to the right of Book B. Book D is between Book A and Book B. Which book is on the far right?Answer: Book C is on the far right. Book A is to the left of Book B. Book C is to the right of Book B. Book D is between Book A and Book B.!.40. Alice, Bob, and Carol are sitting in a row. Alice is not sitting on the left end. Bob is sitting on the right end. Who is sitting in the middle?Answer: Alice is sitting in the middle. Alice is not sitting on the left end and Bob is sitting on the right end. So Alice must be sitting in the middle.!.。
2023年外国语学校小升初入学考试中英文奥数题库
外国语学校小升初英语奥数训练题第一部分1、三个素数旳倒数之和是20061155，则这三个素数中最大旳是多少？ 1. The sum of the reciprocals of three prime numbers is 20061155, so what is the greatestone among the three prime numbers?2、有一种分数，它旳分子加2，可以约简为74；它旳分母减2，可以约简为2514。
这个分数是多少？2. There is a fraction. If its numerator adds 2, it can be reduced to be 74; if itsdenominator subtracts 2, it can be reduced to be 2514. So what is this fraction?3、一种数分别除以1411，2110，4920，所得旳商都是自然数。
这个数最小是多少？3. A number is divided by 1411, 2110 and 4920respectively and the quotients are allnatural numbers. So what is the minimum value of this number?4、一片竹林，去年不开花旳竹子比开花旳2倍还多55棵，今年又多了100棵开花，这时开花旳竹子恰好是不开花旳4倍，这片竹林有多少棵竹子？ 4. There is a bamboo forest. Last year, the non-blooming bamboos were two times and 55 more than the blooming bamboos. With another 100 bamboos blooming this year, the blooming bamboos are four times as many as the non-blooming bamboos. So, how many bamboos are there in this forest?（红色旳地方我有点不确定，葛老师您看看应当怎么翻）5、从12110181614121+++++中去掉两个分数，余下旳分数之和为1。
小升初英文奥数题
英文奥数1．maths(English)1）Find the sum of all the prime numbers Between 20 and 30.2）Divide the sum of the first five odd numbers by the sum of the first two prime numbers.3）Subtract 2 from the sum of the first five even numbers. The difference is then divided by the first odd number following 5. What is the quotient4）Find the value of[4+8]÷[5×4-6]and give the answer correct to 2 decimal places 1）All the prime numbers between 20 and 30 are 23 and 29，The sum of all the prime numbers Between 20 and 30 = 23 + 29 = 522）The first five odd numbers are 1, 3, 5, 7and 9The sum of the first five odd numbers = 1 + 3 + 5 + 7 + 9= 253）The first two prime numbers are 2 and 3The sum of the first two prime numbers = 2 + 3= 54）The first five even numbers are 2, 4, 6, 8 and 10The sum of the first five even numbers= 2 + 4 + 6 + 8 + 10= 305）The difference between the sum of the first five even numbers and 2= 30 - 2= 286）The first odd number following 5 is 7The quotient = 28 / 7= 47）The value of [4+8]÷[5×4-6]= 12 ÷ ( 20 - 6 ) = 12 ÷ 14= ( Corr. to 2 decimal places )2．Six trees are equally spaced along one side of a straight road. the distance from the first tree to the fourth is 60 feet . what is the distancein feet between. The first and last trees3．At the end of 2005 walter was half as old as has snm of the years in which they were born is 3860 .how old will walter be at the end of 20064．The digits 1,2,3,4 and 9 are each used once to form the greatest possible even five-digit number. What is the digit in the tens place*************************************************1、In 2004, 16 June falls on a Wednesday. On what day of the week wi ll 16 June fall in 20102、In a magic square the sum of the numbers in each row, in eachdiagonal and in each column are equal. In this magic square the value of x is:3、If half of a number is 30, then three-quarters of that number is_ ___.4、The sum of the digits of the following product999×5555．Three positive integers have a sum of 28. The greatest possible p roduct that these integers canhave is_____.6、Jack was trying to tessellate regular pentagons. He managed thefollowing figure.The size of angle .a. is______.7、If the area of the shaded region of the regular hexagon in the diagrambelow is 36 cm2, the area of the whole hexagon in cm2 is_____. 8、In what follows, □and Δare different numbers.When 503 is divided by □the remainder is 20.When 503 is divided by Δthe remainder is 20.When 493 is divided by □x Δthe remainder is_____.9、A lady, her brother, her son and her daughter (all related by bi rth) playedvolleyball. The worst player's twin (who is one of the four pla yers) and thebest player are of opposite sex.The worst player and the best player are of the same age.Who cannot be the worst player(s)A) brother only B) daughter onlyC) son and daughter only D) lady and daughter onlyE) lady only10、If you continue the given number pattern, in what row and in wha tposition in that row will the number 320 be1 -------------- row 12 3 -------------- row 24 5 6 -------------- row 37 8 9 10 -------------- row 4The answers are given in the order of row ; position.参考答案：1、Wednesday2、123、454、27（求数位上上的数字之和）5、28=9+9+10，因此答案为8106、36度7、1088、503-20=483 483=3×7×23＝21×23，因此□x Δ＝483，因此此题余数是10.9、D 10、25，20##**##***************###############·········****#####附一道考试真题：At10:30, the angle less than 180°Formet by hour hand and minuteHand of normal clock is***( 英汉词典：angle角；less than小于；to from形成；hour hand 时针；Minute hand 分针；normal正常，正规； clock 钟，时钟）***上面是一道关于时钟问题的英文奥数题，猜猜是什么意思附参考答案：如果做过相关的时钟问题，借助于所给的解释可以理解到：求10：30分时，时针与分针所形成的小于180的夹角是多少答案：135°。
小升初英语数学竞赛策略练习题40题
小升初英语数学竞赛策略练习题40题1.There are five apples and three oranges. How many fruits are there in total?A.SevenB.EightC.NineD.Ten答案：B。
本题考查数字的加法运算。
五个苹果加三个橘子，总数是八个。
A 选项是七，不符合；C 选项是九，不符合；D 选项是十，不符合。
2.There are ten pencils. Tom takes away three pencils. How many pencils are left?A.SixB.SevenC.EightD.Nine答案：B。
本题考查数字的减法运算。
十支铅笔拿走三支，还剩七支。
A 选项是六，不符合；C 选项是八，不符合；D 选项是九，不符合。
3.There are eight books on the desk. Lucy puts two more books on the desk. How many books are there on the desk now?A.TenB.ElevenC.TwelveD.Thirteen答案：A。
本题考查数字的加法运算。
八本书加上两本，现在桌上有十本书。
B 选项是十一，不符合；C 选项是十二，不符合；D 选项是十三，不符合。
4.There are twelve students in the classroom. Five students go out. How many students are left in the classroom?A.SevenB.EightC.NineD.Ten答案：A。
本题考查数字的减法运算。
十二个学生出去五个，还剩七个学生在教室里。
B 选项是八，不符合；C 选项是九，不符合；D 选项是十，不符合。
5.There are seven days in a week. How many days are there in two weeks?A.TenB.FourteenC.ElevenD.Twelve答案：B。
小升初英文奥数题11.doc
小升初英文奥数题 1 1、I n 2004, 1 6 June falls on a Wednesday. On what dayof the week will 16 June fall in201 0?2、If half of a number is 30, then three-quarters of that number is.3> The sum of the digits of the following product 999x 5554、Three positive integers have a sum of 28. The greatest possible product thatthese integers can have is __________ .5、I n what follows, □ and △are different numbers.When 503 is divided by □ the remainder is20.When 503 is divided by △the remainder is 20.When 493 is divided by □ x A t he remainder is.6、A lady, her brother, her son and her daughter (all related by birth) played volleyball. The worst player's twin (who is one of the four players) and the best player are of opposite sex.The worst player and the best player are of the same age.Who cannot be the worst player(s)?A) brother only B) daughter only C) son and daughter only D) lady and daughter only E) lady only7、If you continue the given number pattern, in what row and in whatposition in that row will the number 320 be?1 -------------------- row 123 ---------------------- row 2456 ---------------------- r ow3 7 8 9 10 ----------------------- row 4The answers are given in the order of row ; position.参考答案：1、Wednesday 2. 45 3、27 (求数位上上的数字之和)4、28=9+9+10,因此答案为810 5、503-20=483 483=3x 7x 23=21x 23, lilllta x A=483,因Uhl 七题余数是10. 6、D 7、25, 20 2009小升初英文奥数题[2]1、Did you know? I n the decimal number system (base 1 0) 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, i.e. 0 and 1. Which one of the following numbers is not a valid number in the octal number system (base 8)? A) 1 28B) 127 C) 126 D) 125 E) 1242、The number of diagonals that can be drawn in a regular polygon with twenty sides (icosagon) is.3> If a and b are integers, 1 0A3= 1,152A7= 3, and then 379A6 is equal to __________________ .4、Two numbers are in the ratio 2 : 3. When 4 is added to each number the ratio changes to 5 : 7.The sum of the two original numbers is.5、The greatest number of Mondays which can occur in 45 consecutive daysis ____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.7、Three girls A, B and C run in a 1 00 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)8、The areas of the faces of a rectangulabox are 84 cm2 , 70 cm2and 30cm2.The volume of the box in cm3 is.9、You have 3 weights: 1 kg, 3 kg and 9 kg as well as an equal arm balance, asshown. How many different weight objects can you weigh with these three? [Remember the weights may be placed on either side] 参考答案：1、A考察我们学过的简单的进制问题，显然8进制中没有8出现2、170找规律，公式为nx (n-3)-23、1定义新运算，就是求379-6的余数。
小升初英文奥数题[2]
![小升初英文奥数题[2]](https://img.taocdn.com/s3/m/b3ba71984b35eefdc9d3332c.png)
小升初英文奥数题[2]第一期英文奥数推出之后，家长和同学们都反映非常好，说受益匪浅。
因此我们推出系列二。
但同时也有些问题，很多家长反映孩子觉得比较难。
首先希望家长多多辅导孩子，其实奥数知识同学们是都会的，但是有些英文单词不认识，希望家长帮助孩子共同提高。
另外，我们只是希望那些比较优秀的同学和学有余力的同学来做，没有必要所有同学都要会做。
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, i.e. 0 and 1.Which one of the following numbers is not a valid number in theoctal 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 with twenty sides (icosagon) is_____.3、If a and b are integers, 10?3=1,152?7=3, and then 379?6 is equal to_____.4、Two numbers are in the ratio 2 : 3. When 4 is added to each number the ratio changes to 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 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____.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 whenA finished?(Let’s assume all the athletes run at a constant speed)8、The areas of the faces of a rectangulabox are 84 cm2 , 70 cm2and 30 cm2.The volume of the box in cm3 is____.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]参考答案：1、A 考察我们学过的简单的进制问题，显然8进制中没有8出现2、170 找规律，公式为n×（n-3）÷23、1 定义新运算，就是求379÷6的余数。
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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, i.e. 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) 1242、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, 10??3=1, 150??7=3, and then 379??6 is equal to_____.如果a和b都是整数，那么379??6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 : 7.The 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 cm2.The 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？2.The 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=10.So ,for example,XCIX is 99.What 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？3.In a certain town some people were affected bya'flu' epidemic .In the first month 20% of the population contracted the ful whilst 80% were healthy.In 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？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 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 Sipho.Sipho 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，Barry坐在不远的左边，Sipho不坐在长椅的任何一头，Eric坐在Barry的右边，但是并不需要挨着他，Fatima也不挨着Sipho，Sipho也不挨着Barry，那么谁坐在最右边？5.Of the 28 T ?shirts in a drawer ,six are red ,five are blue ,and the rest arewhite.If Bob selects T-shirhs at random whilst packing for a holiday ,what is the least number he must remove from the drawer to be sure that he has three T-shirts of the same colour ?抽屉里有28件T-恤衫，6个红色的，5个蓝色的，剩下的都是白色的，如果他随意取出T-恤衫去度假，要确保他有3件是同一颜色的，请问他从抽屉中拿出的T-恤衫的最少数量是多少件？6.In an alien language ,jalez borg farn means "good maths skills".Nurf klar borg means"maths in harmony" and darko klar farn means"good in gold" .What is "harmony gold "in this language?在外星人语言中，jalez borg farn 意思是"good maths skills"。
………7.Five children ,Amelia ,Bongani ,Charles,Devine and Edwina ,were in the classroom when one of them broke a window. The teacher asked each of them to make a statement about the event,knowing that three of them always lie and two always tell the truth.Their statements were as follows :Amelia :"Charles did not break it ,nor did Devine." 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 ?五个熊孩子，Amelia ,Bongani ,Charles,Devine and Edwina，在教室里玩疯了，突然有一个打破了窗户。