2. (archaism) The reward for a person who works for one year is to give him a dress and 10 silver coins, but after seven months, he decides not to continue working. I gave him a dress and two silver coins when I checked out. How much silver is this dress worth?
3. It is known that five A-type machines fill 8 boxes of products a day, and seven B-type machines fill 1 1 box of products a day, leaving 1. Each type A machine produces 1 product more than type B machine every day. How many products are there in each box?
4. The original speed of an atmospheric car was 30 km/h, and now it starts to accelerate at a constant speed, increasing the speed by 20 km/h; The original speed of a car was 90 km/h, but now it starts to accelerate at a constant speed and decelerate10 km/h. How long is the speed of the two cars the same? What is the speed?
5. The total workload completed by four workers in group A in March is more than 20 pieces, which is four times the per capita quota of this month, and the total workload completed by five workers in group B is six times the per capita quota of this month, which is less than 20 pieces.
(1) If the actual per capita workload of the two groups of workers is equal this month, what is the per capita quota this month?
(2) If the per capita work actually completed by the workers in Group A is 2 more than that in Group B, what is the per capita quota this month?
(3) If the per capita work actually completed by workers in Group A is 2 yuan less than that in Group B, what is the per capita quota this month?
6. It is known that five A-type machines are full of 8 boxes a day, and four B-type machines are full of 1 1 box a day, leaving 1 box. Each type A machine produces 1 product more than type B machine every day. How many products are there in each box? 7. The original speed of a big car is 30 km/h, and now it starts to accelerate at a constant speed, increasing the speed by 20 km/h, while the original speed of a small car is 90 km/h, and now it starts to decelerate at a constant speed, which is10km/h. How long will it take for the two cars to have the same speed? What is the speed of the car at this time? 8. The school allocates dormitories to new students. If there are five people in each room and two people have no accommodation. If there are six people in each room, there are eight vacancies. How many boarding students are there in this school? 9. Both Party A and Party B leave from place A to place B at the same time. Party A rode his bike at a speed of 10km/h, and Party B walked at a speed of 6 km/h. When Party A arrived at B, it was still 8km away from B. How long did Party A walk? What's the distance between AB and Beijing? 10. A bookstore launched a discount card in the promotion activities, and each 20 yuan can enjoy a 20% discount when purchasing books with this card. Once, Li Ming went to the bookstore to buy books. He bought a discount card first, and paid with it, saving 12 yuan. So what is the total value of Li Ming's books this time? 1 1. Forge a long cylinder with a base diameter of 10 cm and a height of 36 cm into a thick cylinder with a base diameter of 20 cm. What is the height? 12.A needs 15 days to complete a project alone, and B needs 12 days. Now, after doing it for a while, B joined the project, so that B completed the project in only 4 days. How many days did it take to complete this project? A city charges a monthly gas fee according to the following regulations: if the coal consumption does not exceed 60m cubic meters, it will be charged according to the 0.8 yuan per cubic meter; If it exceeds 60m3, the excess will be charged per cubic meter 1.2 yuan. It is known that the average gas bill of a user in April is 0.88 yuan per cubic meter, so how much should the user pay for the gas bill in April? 14 ... A pool contains 84 tons of water, and there are two water pipes, A and B. Pipe A drains 2.5 tons per hour and pipe B drains 3.5 tons per hour. If the first pipe is opened and the second pipe is opened after 2 hours and 24 minutes, how many hours can the water in the pool be discharged after the first pipe is opened?
15. The correspondent sent a letter from A to B, and immediately returned to A. * * * It took 3 hours and 52 minutes, with a speed of 30 km/h when he left and 28 km/h when he came back. Find the distance between A and B.
16.A walk 5 kilometers per hour, and after 2 hours, B rides a bike to chase A. ..
(1) If the speed of B is 20km/h, how long will it take for B to catch up with A?
(2) If B is required to go 14km to catch up with A, what is the speed of B?
17. Party A and Party B practice race walking on the 400m circular runway. Party B walks 80 meters per minute. The speed of Party A is 1, which is a quarter of that of Party B (1 1/4). Now Party A is in front of Party B 100 meters. How many minutes will it take them to meet for the first time?
1. has a three-digit number, and its unit is three times smaller than the number on the 100th place, and the number on the unit is 1. If you exchange the number in the tenth place and the number in the hundredth place of this three-digit number to get a new number, then the original three-digit number is 270 times smaller than the new number and the original three-digit number is found.
18. The school has a four-story teaching building with six classrooms on each floor. There are three doors (two front doors and a side door of the same size) entering and leaving the building. This door was tested during the safety inspection. When a main entrance and a side door are opened at the same time, 400 students can pass through in 2 minutes. If the main entrance has an average of 40 more students per minute than the side entrance.
(1) How many students can pass through a main entrance and a side door every minute on average?
(2) During the inspection, it was found that the efficiency of going out was reduced by 20% because students were too crowded in an emergency. According to the safety regulations, in case of emergency, students in the whole building should be evacuated safely through these three doors within 5 minutes. Suppose that each classroom in this teaching building has a maximum of 45 students. Q: Do these three doors meet the safety requirements? Why?
19. From City A to City B, Party A walks 4 kilometers per hour, and Party B rides 8 kilometers per hour more than Party A. Half an hour after Party A leaves, Party B arrives at City B at the same time to find the distance between the two cities.
20. There are many students in the education middle school asking for cancellation. If there are 4 people living in each dormitory, there are 20 people left; If there are 8 people living in each dormitory, one dormitory is not empty and the others are full. Q: How many dormitories are there in this middle school? How many students are required to live on campus?
2 1. A train is running at a constant speed. Guangxu saw the milestone flash outside the window, and there were two digital marks on the monument. An hour later, Guangxu saw another milestone, also marked with two digits, but the position of the two digits was interchanged with the two digits he saw for the first time. After another hour, Guangxu once again saw a milestone marked with three numbers and added a 0 between the two numbers he saw for the first time. Find the speed of the train.
22. A math contest has 20 questions, all of which are multiple-choice questions. Scoring rules are: 5 points for each question, 2 points for no answer, and-1 point for wrong answer (that is, 1 points for reverse deduction), but the total score of the test paper is at least 0 point. A classmate took part in the competition. What are the possibilities of his total score?
Please find three consecutive natural numbers and find any two fractions (one for denominator and one for numerator). ) is another natural number.
24. Four digits is a complete square number. After subtracting the same number from each number, it is still a complete square number of four digits. How many such four digits are there?
25. There is only a mountain road from A to B, and there is no smooth road. Xiao Wang will be right back from A to B, going for 2 hours and coming back for 2.5 hours. If the speed of going back to the mountain is 5 kilometers per hour and the speed of going down the mountain is 8 kilometers per hour, please follow.
How many kilometers is the distance from A to B?
26. A company has a bank deposit of * * * 200,000 yuan with two different properties. The annual interest rate of deposit A is 1.4%, and that of deposit B is 3.7%. The company's annual income is * * * 6,250 yuan. How much is the A deposit and the B deposit * *? (excluding interest tax) Respondent added 2011-02-0918: 53 27. A store first increased the original selling price of a color TV by 40%, and then wrote "big reward, 20% discount" in the advertisement. After the customer complains, the law enforcement department will increase the illegal income by 65438+. What's the price of each color TV?
28. A passenger in an ordinary cabin can carry up to 20 kilograms of luggage free of charge, and the excess can be purchased at 0/.5% of the air fare per kilogram/kloc. A passenger carries 35 kilograms of luggage and pays the air ticket and baggage fee 1323 yuan. How much is the fare for passengers?
Let the air ticket price be x, x+1.5% * x *10 =1323.
The fare is 1 150.43 yuan.
29. Xiaoming got 82 points in the first math test, 96 points in the second, and at least how many points in the third. The average score of these three tests is not less than 90 points?
30.a starts from a city by bike. Two hours later, B walked the same road for three hours, and the distance between them was 16km. At this time, B continued to catch up. A rested in the same place 1 1/3 hours, and then returned from the same place. 1 hour later, Party A and Party B will separate from point C. How far is point C from a city? 32. A company ordered X white shirts and Y flowered shirts in a store, and the price of each white shirt was one and a half times that of flowered shirts. When I bought shirts, I found that the numbers of white shirts and flower shirts were just changed to the original numbers. After checking, the order was filled in incorrectly, and the ratio of the amount of money required according to the original idea to the actual amount payable was expressed as a fraction.
33. A school has a 199 teacher and student who want to rent a car to travel. If you rent an A-class station wagon that can take 45 people, rent a car in 400 yuan; If you rent a second-class station wagon that can take 32 people, rent a car in 300 yuan. If you rent two cars at the same time, what is the lowest cost? What's the minimum charge?
34. The starting price of taxis in a city is 10 yuan (i.e., the fare within 5km is 10 yuan). When it reaches or exceeds 5km, 1 km is 1.2 (less than 1 km is also counted as 1 km).
)。 Now someone takes a bus from A to B, paying 17.2 yuan. What is the approximate distance from a to b?
35. The distance between the two places is 300KM, and there are ships sailing in the two places. If it takes 15H downstream and 20H downstream, what is the speed format of a ship sailing in still water against the current?
36. There are 1, 5, 1 yuan 10 coins and * * * 7 yuan 15 coins. 1, 5, 1 How many coins are there? 37. There are (5A-4) passengers on a bus, and (9-2A) passengers get off when they arrive at the station. How many passengers are there on the bus?
38. The school organizes students to practice in the countryside 3 1km away from the school, with 3 hours in the morning and 4 hours in the afternoon, and the average speed in the afternoon is slower than that in the morning 1km. What is the average speed in the morning and afternoon?
39. A swimmer went upstream and lost an empty plastic kettle in one place. When he advanced 50 meters to B, he found that the kettle was lost and immediately returned to look for it. He found it in section C. This man's swimming speed is 0.5 times the current speed of 65438+. How many meters did he swim from losing it to finding the kettle?
40. There are three kinds of texts: A, B and C. If you buy two A's, 1 B's and three C's, you need 23 yuan. If 36 yuan needs to buy 1 block, 4 blocks B and 5 blocks C * *, how much does it cost to buy 1 block, 2 blocks B and 3 blocks C * *?
4 1.a and b practice running on the 400-meter circular track. If they run in the same direction, they meet every 3 minutes and 2 seconds. If you run relatively, meet every 40 seconds. What are the speeds of A and B respectively?
42.40-legged centipede and Hydreigon are in a cage. * * * There are 26 heads and 298 feet. A centipede with 40 feet has only one head. How many feet does Hydreigon have? 43. A batch of ***840 pieces will take 8 days to complete if Party A works for 4 days first and Party B joins the cooperation. If Party B does it for 4 days first and Party A joins the cooperation, it will take 9 days to complete it. How many pieces do two people make every day?
Xiao Ming plays games with his classmates. He is required to go 20 meters ahead from a certain point, turn left 30 degrees, go 20 meters ahead and turn left 30 degrees until he returns to a certain point. How many meters did Xiaoming walk?
45. A school has 200 senior one students taking the mid-term exam. The average score of students who passed the math exam is 87, that of students who failed is 43, and that of senior one is 76. How many people passed and failed the exam?
46. A construction team wants to recruit workers A and B 150, and the monthly wages of workers A and B are respectively 1000 yuan in 600 yuan. Now Party B is required to be no less than twice that of Party A's workers. What is the minimum wage?
47. A shopping mall plans to allocate 90,000 yuan to buy 50 TV sets from manufacturers. It is known that the ex-factory prices of three different models of TVs produced by this manufacturer are A 1.5 million yuan, B 2 1.0 million yuan and C 2500 yuan respectively.
(1) If the shopping mall buys 50 TV sets of two different models at the same time, which costs 90,000 yuan, please study the purchase scheme.
(2) If a shopping mall sells a TV, what is the maximum profit of the scheme in 150 yuan, 200 yuan B, 250 yuan C, (1)? 48. Hangzhou East Road, known as the urban landscape, spans the lake for1.857m, and its greening indicators are shown in the following table. Analyze the table and answer the following questions:
Number of main tree species
Zhangshu 336
Liu Shu 188
Palm 258
Osmanthus fragrans 50
A total of 832 people
It is known that Hangzhou East Road is 4744 meters long. When the row spacing (horizontal distance between two trees) is unchanged, please estimate the number of camphor and palm trees planted along the line (the result is an integer).
49. Someone bought a one-year bond with a certain amount of RMB, with an annual interest rate of 65,438+00%. After the maturity, he took out half of the principal for shopping, and the remaining half and the interest earned all bought this one-year bond (interest unchanged). Upon maturity, I got the principal and interest and 1, 320 yuan. How much did the man spend on this bond?
50. There are 20 questions in a math contest for first-year students in a school. Add 5 points for each correct answer. 1 point will be deducted for each wrong answer or no answer. How many questions do you have to answer correctly in 70 points? /information17/89675.htm is downloaded from this website, which contains many calculation problems.