28. The walking speed ratio of Party A and Party B is 1 1: 7. The two took opposite directions from A and B, and met two hours later. If two people go in the same direction, will A catch up with B in a few hours?
29. There are 45 students going to the suburb 30 kilometers away from the school. There is only one car in the school that can take 15 people, and the speed is 60 km/h. The speed at which students walk is 4 kilometers per hour. It will take them at least a few hours to get to the workplace as soon as possible.
Supplement to the respondents 2009-08- 19 2 1:57 2. Party A, Party B and Party D jointly build roads, with Party A building the other three teams 1/3, Party B building the other three teams 1/4 and Party C building the other three teams 1/5. From A to B, it is downhill, with Xiaohua going uphill for 60m per minute and downhill for 100m per minute. It takes 8 minutes for a floret to go from A to B than from B to A. What is the distance from A to B?
The 1200 exercise book with a cost of 0.25 yuan was sold at a profit price of 40%. After 80% of them are sold, the remaining exercise books are sold at a discount, with a predetermined profit of 86%. How much discount was given to the rest of the exercise books when they were sold?
A, B, C, D * * four children have 38 pencils, B has 65,438+0 more than A, C has 65,438+0 more than B, D has 1 more than C ... How many pens do A, B, C and D have?
Party A and Party B had two * * * deposits of 2000 yuan, and later Party A had another deposit of 100 yuan, and Party B took out13 of his own deposit. At this time, Party A is twice as many as Party B. How many do they have now?
There are 6 15 students in the fourth, fifth and sixth grades of primary schools in Yu Ying. It is known that 1/2 of grade 6 is equal to 2/5 of grade 5 and 3/7 of grade 4. How many students are there in each of these three grades?
Two cars, Party A and Party B, leave Station A at the same speed at 10. The distance between Party A and Party B is three times that of Party A, and the distance between Party A and Party B at 10 is twice that of Party A. When did Party A leave Station A?
A wall clock rings at the hour and half an hour, half an hour, several times at the hour, and several times a day and night. From A to B, it is downhill, with Xiaohua going uphill for 60m per minute and downhill for 100m per minute. It takes eight minutes for a floret to go from A to B than from B to A. What is the distance between A and B? A pool of water is given to a Kyle 14 days, and the water consumption of a sheep for 5 days is equal to that of a horse for 2 days. If a horse and a sheep drink this pool water together, how many days can they drink it? The value of three batches of goods is 2250 yuan, the mass ratio of the first and second batches is 1 2, the unit price ratio is 3 1, the mass ratio of the second and third batches is 1 2.5, and the unit price ratio is 7/3. How much is each of these three shipments worth? 1. A cylindrical reservoir with a bottom circumference of 62.8 meters can hold 1884 cubic meters of water. If the depth is 1.5 meters, how many cubic meters of water can this reservoir hold?
It takes four matches to set a square with matchsticks, seven matches to set two squares in succession, and 10 matches to set three squares in succession. How many matches does it take to put 50 squares like this?
Six people from the first team of Young Pioneers participated in planting trees. According to the plan, an average of 65,438+00 trees were planted. When actually planting trees, 1 people didn't come, and others still completed the team plan. How many more trees have actually been planted per person? (Two solutions) 1, Master Wang processes 60 parts in 5 hours. According to this calculation, three hours of processing, a * * *, how many parts are processed?
Master Wang processes 60 parts in 5 hours. According to this calculation, how many hours does it take to process 36 parts? Master Wang processes 60 parts in 5 hours. According to this calculation, how many hours will it take to complete the processing task of 96 parts?
A tofu shop made 160 kg of tofu with 40 kg of soybeans. According to this calculation, how many kilograms of soybeans do you need to make 552 kilograms of tofu? 1. The current price of a computer is 4000 yuan, which is lower than the original price 1000 yuan. How much is the current price lower than the original price?
2. On this day of the supermarket, the turnover in the morning was 1.34 million yuan, which was 0.92 million yuan less than that in the afternoon. What is the daily turnover of the supermarket? 3.200 1 There are 38 civil servants in Sunshine Town after downsizing, which is less than the original 12. What is the proportion of layoffs?
Guangxin Primary School wants to build a circular flower bed. It takes 65,438+00 days for Construction Team A to complete it alone, and 65,438+05 days for Construction Team B to complete it alone. Now both teams need to work together. The project started on August 24th. Can it be completed before the school starts in September/KLOC-0? (2) A family of three people. My father is three years older than my mother. Now the total age of their family is 80 years old.
10 years ago, the total age of the whole family was 5 1 year. How old is my daughter this year?
(3) Xiao Yong's three subjects are not Chinese, with an average score of 98, not math, and an average score of 93, not English.
The average value is 9 1. What is the average score of three subjects in Xiao Yong?
(4) if A#B=B-A
-
A times b so1# 2-2 # 3-3 # 4-... 2002 # 2003-2003 # 2004 =?
A stationery store sells/kloc-0.02 yuan, and two kinds of commemorative books in 80 yuan, both of which have a profit of 30%. However, each 120 yuan album is not as good as that of 80 yuan. At present, a customer wants to buy a certain number of commemorative albums of the same variety with 1080 yuan in cash. After calculation, according to the customer's requirements (buying the same kind, the profit of the store is the same as selling the same number of 80 yuan commemorative albums. According to the above information, how many commemorative books of 120 yuan did this customer buy? 1: There are two bags of rice, and bag A is less than bag B. 18kg, if 6kg is poured from bag A into bag B, the weight of bag A is five eighths of that of bag B, how many kilograms are there in these two bags of rice? 2. To produce a batch of parts, Party A can produce 3 pieces per day and Party B can produce 5 pieces per day, so it takes Party A 4 days longer than Party B to complete the task of these parts ... How many parts are there in this batch? 3. There are 20 students who participated in the math contest, with an average score of 83, including 85 for boys and 80 for girls. Several girls took part in the competition. There are some apples and apple boxes. If each box contains 25 kilograms, there will be no room for 40 kilograms left. If each box contains 30KG, there will be 20 empty boxes, and as many apples as there are kilograms, you will find as many apple boxes.
2. Someone bought two stocks, A and B, for 24,000 yuan and sold them when A stock appreciated 15% and B stock fell 10%. * * * Profit 1350 yuan. How much did this man buy? (stamp duty and handling fee are not considered)
3. A middle school organizes seventh-grade students to go for a spring outing. It was originally planned to rent a number of 45-seat buses, but 10 people had no seats. If you rent the same number of 60-seat buses, there will be one more bus with five seats. It is known that the daily rent of 45 buses is 200 yuan, and the daily rent of 60 buses is 250 yuan. Try asking:
(1) What is the number of students in Grade 7? How many 45-seat buses were originally planned to be rented?
(2) How to rent a seat for every student is more cost-effective?
4. In an environmental knowledge contest, * * * has 20 questions. For each question, if you answer one question correctly, you will get 10. 5 points will be deducted if the answer is wrong or not. If you answer at least a few questions correctly, you will get no less than 100.
5. A ship travels downstream at the speed of 20KM per hour and upstream at the speed of 16KM per hour, so as to find out the speed and current speed of the ship in still water. 1, chickens and rabbits live in the same cage. * * * There are 100 heads and 280 feet. How many chickens and rabbits are there? -2. A car gets off at a station, 25% people get off and 6 people get on. At this time, the car is exactly 90% of the original car. How many people are there? -3. Process a batch of parts, and the ratio of finished parts to unfinished parts is 1: 3. If 140 parts are reprocessed, 3/5 (three-fifths) of this batch of parts will be completed. How many parts are there in this batch? -4. Divide a circle into several parts and cut along the radius to make a rectangle. The circumference of a rectangle is 24.84 cm. How many square centimeters is the area of a rectangle? For a test with 20 questions, you will get 6 points if you do one question correctly and 3 points if you do one wrong. Xiao Huan answered all the questions and got only 70 points. How many questions did he answer correctly? The base of an isosceles triangle is 20 cm, the waist is a cm and the height is b cm. The circumference of this triangle is () cm and the area is () cm 2.
1, chickens and rabbits live in the same cage. * * * There are 100 heads and 280 feet. How many chickens and rabbits are there? -2. A car gets off at a station, 25% people get off and 6 people get on. At this time, the car is exactly 90% of the original car. How many people are there? -3. Process a batch of parts, and the ratio of finished parts to unfinished parts is 1: 3. If 140 parts are reprocessed, 3/5 (three-fifths) of this batch of parts will be completed. How many parts are there in this batch? -4. Divide a circle into several parts and cut along the radius to make a rectangle. The circumference of a rectangle is 24.84 cm. How many square centimeters is the area of a rectangle? For a test with 20 questions, you will get 6 points if you do one question correctly and 3 points if you do one wrong. Xiao Huan answered all the questions and got only 70 points. How many questions did he answer correctly?
30. The students of Class A and Class B leave school at the same time and go to the Children's Palace. The walking speed of Class A is 5 kilometers per hour, and that of Class B is 6 kilometers per hour. There is a car in the school that can just take a class of students. This car travels 30 kilometers per hour. What is the walking distance ratio between Class A and Class B in order to get the students from the two classes to the Children's Palace as soon as possible?
3 1. A car from A to B can arrive 1 hour earlier than the original time if its speed is increased by 20%. If you drive at the original speed of120km and increase the speed by 25%, you can arrive 40 minutes earlier than the original time. What is the distance between a and b?
32. There is an expressway from City A to City B, which is divided into three sections, of which the first section is twice as long as the third section. On the first section of the road, the speed of the car is 40 kilometers per hour; On the second section of the road, the speed of the car is 90 kilometers per hour; On the third road, the speed of the car is 50 kilometers per hour. At present, two cars are leaving from A and B at the same time, and1/will meet at the second section 1/3 (1/3 from A to B) in 20 minutes. So how many kilometers is it between A and B?
33.A car and B car leave from A to B at the same time. After driving at the original speed of 2/3 of the whole journey, the speed of car A increased by 1 times, and the result was that it arrived at place B two hours earlier than originally planned. The speed of car B has been increased by 1 times after driving at the original speed of 30 km/h/4. As a result, the two cars arrived at B at the same time. So how many kilometers does A plan to drive every hour?
There are long-distance buses running at a fixed speed between city A and city B.. If the speed is 6 kilometers faster than the original speed, you can arrive 20 minutes earlier. If the speed is 5 kilometers slower than the original speed, it is 24 minutes late. What is the distance between a and b?
35.
In cities, the departure time of buses is fixed. Xiaoming is on his way home after school. He found a bus coming from behind him every six minutes and a bus coming from in front of him every two minutes. He wants to know how many minutes the bus will leave. Can you help him calculate it?
36.
The distance between Party A and Party B is 240 kilometers. The speed of the car from Party A to Party B is 36 kilometers per hour, and the speed of the motorcycle from Party B to Party A is 24 kilometers per hour. 2.5 hours after the motorcycle leaves from Party B, the car also leaves from Party A. How many hours after the car leaves?
37. In order to meet the increasing demand for water, three water plants, A, B and C, were recently built in Kunming. The daily water supply of these three water plants was 1 18000 cubic meters, of which the daily water supply of water plant B was three times that of water plant A, and that of water plant C was 10000 cubic meters, which was more than half of that of water plant A.. What is the daily water supply of these three water plants?
38.
Party A and Party B are shareholders of a service company, with Party A accounting for 60% and Party B accounting for 40% of the shares. Later, they decided to take in Party C, so Party C gave Party A and Party B 1.8 million yuan, which reduced their shares to 35%, and Party C held 30% of the shares. How much should both parties get back?
39. There are five questions in an exam. Questions 1, 2, 3, 4 and 5 account for 8 1%, 9 1%, 85%, 79% and 74% of the participants respectively. If three or more answers are qualified, what is the passing rate of this exam at least?
40. Use 0-9 to arrange three digits.
1) If each number can only be used once, how many possibilities are there?
2) If each number can be used multiple times, how many possibilities are there?
4 1. It's four o'clock. How many minutes will it take for the hour hand and minute hand to coincide for the first time?
42. In a round of football match (each team 1 1 game), if you win a game, you will get 2 points, if you draw a game, you will get 1 point, and if you lose a game, you will get 0 point. The number of times a team loses is m 2/ 1 of the number of times it wins. * * * 14. How many draws will this team play?
43. A test paper contains 25 multiple-choice questions. If you answer a question correctly, you will get 4 points; if you answer it incorrectly or incorrectly, you will get 1 point. A student got 90 points in the exam. How many questions did you answer correctly? Now there are 500 students taking the exam. Did anyone get 83 points? Why?
44. Electricity consumption of urban residents
The basic price is 0.40 yuan per kWh. If the monthly electricity consumption exceeds one kWh, the excess will be charged at 70% of the basic electricity price. (1) A household used 84 kwh of electricity in May, and * * * paid 30.72 yuan to find a. (2) If the household's average electricity bill in June was 0.36 yuan per kwh, how many kwh did the household use in June and how much should it pay?
45.
Zhang Ping has money from 500 yuan and plans to deposit it in the bank for two years. There are two ways to deposit, one is to deposit for two years with an annual interest rate of 2.43%; One is deposit 1 year with an annual interest rate of 2.25%. When 1 year comes, the principal and after-tax interest will be withdrawn and deposited in 1 year. Which method can I choose to get more after-tax interest?
Xiao Ming reads a book. On the first day, he reads 2/ 15 of the whole book, which is 6 pages more than the first day. At this time, the ratio of the number of pages read to the surrounding pages is 3: 7. How many pages can Xiao Ming read before he can finish reading this book?
2. Party A, Party B, Party C and Party D shall jointly build the road. Party A builds three other teams 1/3, Party B builds three other teams 1/4, Party C builds three other teams 1/5, and Party D builds 69m. How long is this road?
3. From A to B, it is downhill, with Xiaohua going uphill for 60m per minute and downhill for 100m per minute. It takes 8 minutes for a floret to go from A to B than from B to A. What is the distance from A to B?
4. The 1200 exercise book with a cost of 0.25 yuan was sold at a profit price of 40%. After 80% of them are sold, the remaining exercise books are sold at a discount, with a predetermined profit of 86%. How much discount was given to the rest of the exercise books when they were sold?
5. Four children of Party A, Party B, Party C and Party D, 38 pencils, Party B 1 pencil, Party C 1 pencil and Party D 1 pencil. How many pens do A, B, C and D have?
6. Party A and Party B have two deposits of 2000 yuan, and later Party A has another deposit of 100 yuan, and Party B has withdrawn13 of his own deposit. At this time, Party A is twice as much as Party B. How much do they have now?
7. There are 6 15 students in the fourth, fifth and sixth grades of primary schools in Yu Ying. It is known that 1/2 of level 6 is equal to 2/5 of level 5 and 3/7 of level 4. How many students are there in each of these three grades?
8. Two cars, Party A and Party B, left Station A at the same speed, 10 o'clock sharp. At 10, the distance from Party A to Station A is three times that from Party B, and the distance from Party A to Station A is twice that from Party B.. When did Party A leave Station A?
9. There is a kind of wall clock. How many times a day and night is it at the hour and half hour, at half hour and at the hour?
1. Xiao Ming read a book, and on the first day he read 2/ 15 of the whole book, reading 6 pages more than on the first day. At this time, the ratio of the number of pages read to the surrounding pages is 3: 7. How many pages can Xiao Ming read before he can finish reading this book? Bright primary school bought two tables and five chairs and handed them over to 1 10 yuan. The price of each table is three times that of each chair. How much is the first table? 1. It is known that the price of a table is 10 times that of a chair, and it is also known that a table is 288 yuan more expensive than a chair. How much is a table and a chair?
2.2.3 The box of apples weighs 45 kilograms. A box of pears is 5 kilograms heavier than a box of apples. How much do three boxes of pears weigh?
3. Party A and Party B walked across two places at the same time. Four hours later, they met four kilometers from the midpoint. A is faster than B. How many kilometers is A faster than B per hour?
Li Junhe Zhang Qiang spent the same money to buy the same pencil. Li Jun asked for 13 pencils, Zhang Qiang asked for 7 pencils, and Li Jun gave Zhang Qiang 0.6 yuan money. How much is each pencil?
At 8 o'clock in the morning, two buses, A and B, set off from two stations at the same time and walked in opposite directions. After a while, two buses reached both sides of a river at the same time. Because the bridge over the river is being repaired, vehicles are forbidden to pass. The two cars need to exchange passengers and then return to their respective departure stations by the same route. When they arrived at the station, it was already 2 pm. Car A travels 40 kilometers per hour and car B travels 45 kilometers per hour. How many kilometers are there between these two places? (The exchange time is omitted)
6. The school organized two extracurricular interest groups to go to the suburbs. The first group walked 4.5 kilometers per hour, and the second group walked 3.5 kilometers per hour. 1 hour later, the first group stopped to visit an orchard, which took 1 hour, and then chased the second group. How long will it take to catch up with the second group? 1, a barrel of oil, take out 3/8 of the total on the first day, take out 7 1 and 1 kg on the second day, leaving 53.5 kg. How many kilograms did you take out on the first day? Apply questions and formulate answers! 1, a PLA unit rushed from the station to a place to fight floods and provide disaster relief. If the vehicle speed is increased by 9 from 1, it can arrive 20 minutes earlier than the scheduled time; If you drive 72 kilometers at the original speed and speed up 1, you can arrive 30 minutes earlier than the scheduled time. How many kilometers is the journey of this PLA unit? 2. If the length of a rectangle with a circumference of 64m is reduced by 1 multiplied by 10, the width is increased by 1 multiplied by 6, and the circumference is unchanged, find the area of this rectangle. 3. It takes 10 days, 15 days and 20 days for Party A, Party B and Party C to do a project alone. 4. When a piece of gold is weighed in water, its weight decreases by 1.09%, and when a piece of silver is weighed in water, its weight decreases by 1.00%. A gold-silver alloy weighs 1.540g, which is reduced by1.000 g. This alloy contains gold and gold. 5. There are three trapezoids A, B and C, and their height ratio is 1: 2: 3, the upper bottom ratio is 6: 9: 4, and the lower bottom ratio is 12: 15: 10. It is known that the area of trapezoid A is 100 cm2. It takes 10 hour to arrive at the port. When returning to Port A from Port B, it takes 5 hours more to travel against the current, and the distance between Port A and Port B is 250 kilometers. Find the speed of the ship in still water and the velocity of the water.
(2) Both parties ride bicycles from two places and walk in opposite directions at the same time. After meeting, they moved on. Four hours later, Party A walked 3/5 of the whole journey and Party B walked 4/7 of the whole journey. At this point, the distance between them is 12 km. How many meters did Party A and Party B walk every hour?
(3) Miss Wang goes to Guangzhou by train from Beijing Railway Station. 10 hours later, the train runs 5+0 1. How long does it take from Beijing to Guangzhou?
(4) Taxi starting price (within 3km) 5 yuan. For those more than 3km and less than 7km, the price will be 1.2 yuan, and the price will be increased by 50% for those more than 7km. Passengers take a taxi from xi Railway Station to a place about 8 kilometers away. How much should they pay when they arrive?
(5) It takes 65,438+00 days for Party A and Party B to complete a project together. Since Party A has completed 5/65,438+02 of the whole project, how many days will it take for Party B to complete it alone?
(6) Four or five students in a class engage in extracurricular activities in groups of six, which is just enough. How many students are there in this class?
(7) If a cuboid iron box with a square bottom is unfolded, a square with a side length of 40cm can be obtained. Find the volume of this iron box.
(8) The printing factory will print 18720 copies, which is planned to be completed in 30 days. The actual number of books printed every day is 1.25 times as planned.
How many copies do you plan to print every day?
(2) How many copies are actually printed every day?
(3) How many days did it actually take you to finish printing these books?
(4) How many days in advance did you actually finish printing these books?
(9) Growing vegetables in greenhouse, it was originally planned to harvest 438kg eggplant in greenhouse 12. The actual output of each greenhouse is more than the planned output 13.8 kg. How many Jin of eggplant did you actually collect?
(10) There are 890 books in the library, which have been lent to two classes in grade six and three classes in grade five, and there are 180 books left. How many books did each class borrow on average?
(1 1) A sewing shop can probably make 12 pairs of trousers a day, and1/kloc-0 pairs of trousers made of rice cloth. The price of each piece of rice cloth is 18.5 yuan, and the price of each pair of trousers is 45 yuan. Let's calculate:
(1) How much is each pair of trousers? A pool of water is given to a Kyle 14 days, and the water consumption of a sheep for 5 days is equal to that of a horse for 2 days. If a horse and a sheep drink this pool water together, how many days can they drink it? The value of three batches of goods is 2250 yuan, the mass ratio of the first and second batches is 1 2, the unit price ratio is 3 1, the mass ratio of the second and third batches is 1 2.5, and the unit price ratio is 7/3. How much is each of these three shipments worth? ) How many days does it take for Party A to type a manuscript for 6 days, Party B for 8 days, Party A for 3 days first, and then type with Party B?
2) A group has to process 960 sweaters, and it has been processed for 37 days, leaving 590 sweaters. At this rate, how many days will it take to complete the processing task?
3) Two trains leave from two stations, A and B, respectively, at the same time, and the journey is completed. It takes six hours for the express train and nine hours for the local train. After two hours of departure, the distance between the two trains is 160 km. How many kilometers is the distance between the two stops? 4) The wire is divided into two sections. The first section is longer than the second section 1 m, and the second section is shorter than the first section16m. How long is this wire?
5) There are four different integers whose average is 14, the average of three large numbers is 15, and the average of three decimals is 12. If the second large number is odd, what is it? 6) There are 97 students in two large classes, from Class A to Class B 14. Class A still has three more students than Class B, so how many students are there in each class? 7) There is a granary. First, 25% of the total stored grain is less than 30 tons of grain, and then 1 10 tons of grain is brought in. At this time, the grain storage is 3/20 higher than the original. How many tons of grain are there in this granary? 8)A and B start from the South and North Stations at the same time, heading in opposite directions, and meet at 12km. It is known that the speed of car A is 5/6 of that of car B. How many kilometers are the two stops apart? Uncle Wang bought three adult female foxes. A female fox is born once a year, with an average of six at a time. Two-fifths of all cubs are female foxes, and females can give birth when they are one year old. How many years will it take Uncle Wang to make the farms of 70 foxes red? Dad's fruit shop sent several kilograms of bananas and pears with the same weight, but for various reasons, bananas sold 1 and pears sold 1, but the prices were all 1.5 yuan. Did the water store make a profit or lose money?
(2) How much gross profit can a sewing shop get in a day?