Six taxis have been parked in the taxi parking lot. After the first taxi leaves, a taxi leaves every 4 minutes. Two minutes after the first taxi leaves, a taxi pulls into the station, and then a taxi returns to the station every six minutes. After the original taxis leave in turn, a taxi leaves every 4 minutes. Q: After the first taxi leaves, a taxi returns to the station every 6 minutes.
There are two trains, one is 190 meters long, the other is 200 meters long, the speed is 48 kilometers per hour, and the speed is 60 kilometers per hour. Two cars pass head-on. How long does it take to find out from the front meeting to leave from the rear?
One day, a young man came to Boss Wang's shop and bought a present. The cost of this gift is 18 yuan, and the list price is 2 1 yuan. As a result, the young man took out 100 yuan to buy this gift. Boss Wang didn't have any change at that time, so he changed the 100 yuan found in the neighborhood to 79 yuan and gave it to the young man. However, the neighborhood later discovered that this 100 yuan was counterfeit, and Boss Wang had no choice but to return it to the neighborhood. The question now is: How much did Boss Wang lose in this transaction?
Seek the results from 2004 to 2004 and from 2005 to 2005.
The father is three times as old as his son this year and four times as old as his son five years ago. How old are the father and son this year?
7 1 triangle needs 3 matches, and 2 needs 5 matches. Let * * * make up n triangles. How many matches does it take to represent n triangles with an algebraic expression about n? There are 2009 matches. How many triangles can you make? What about 2 100?
8 A decoration company receives a business. If it takes 10 days for Group A and 15 days for Group B, in order to complete it as soon as possible, now Group A and Group B are working together. Four days later, because Group A has other tasks, the rest will be done by Group B alone. How many days will it take?
A harvester team harvests 65,438+02 hectares of wheat every day. After harvesting 2/3 of the wheat fields, the harvester team improved its operation, and its efficiency increased by 5/4 times, so it was 1 day ahead of schedule. How many hectares is this wheat field?
There are 45 students in one class. People who can play chess are 3.5 times as many as those who can't play Go. The number of people who can or can't play both kinds of beans is 5, and the number of people who can only play Go is sought.
1 1 With the continuous development of internet technology, the status of the network in people's daily life is becoming more and more important. According to the survey of a telecom company in a city, as of June 2003, there were 49,600 individual registered users in the city, and the number of individual registered users increased by 55% every year in the previous two years. So how many households were there the year before last?
12 The known expansion formula (X2-X+ 1) is a polynomial of degree 46, which is set as A0+a1x+a2x2+``````````+A46x46.
Find the value of A0+a1+A2+```````+A46.
(The numbers after X are all squares, and the numbers after A are written in the lower right corner. )
13 knows that a=22 to the 55th power,
B=33 to the 44th power,
C=55 to the 33rd power,
D=66 to the 22nd power,
Then the relationship between a, b, c and d is ()
14 has an integer, and the sum of the three remainders obtained by dividing 82, 165 and 240 by it is 3. What is this integer?
Six cases 15, weighing 16, 18, 19, 20, 3 1 kg respectively. Two people bought five cases, and it is known that one person bought twice as much as the other. How much is the last box?
16 I don't know the number of things today, three to two, five to three, and seven to two. I asked how many things there were.
17 There are two things in a basket, one thing is 240, the other thing is 3 13, and the two things are divided into people. One thing is not enough for two people, and one thing is not enough for seven people. Ask people at most.
18 A, A and C went to a place to rent a house. According to Liu, they can rent an ideal residence in Zhangchu at the price of 100 yuan. Zhang learned that it was three students, so he gave 50 yuan a discount and rented a house with 250 yuan. Liu got 20 yuan, and three students, A, B and C, each got it back 10 yuan. At this time, student A felt wrong and asked:
We each pay 100 yuan, ***300 yuan. But now we each rent this house in 90 yuan * * * 90*3=270 yuan; Plus Liu's 20 yuan, * * * meters 270+20=290 (yuan) and 10 yuan, I don't know where it is. How do you explain this?
19 has a red bottle and a blue bottle. There are 100 tablets of red medicine in the red bottle and 100 tablets in the blue bottle. Now, pour 10 tablets of red medicine from the red bottle into the blue bottle, and then pour 10 tablets of blue medicine into the red bottle. How much is the red medicine X in the red bottle and the blue medicine Y in the blue bottle at this time? Who is older?
Choose one of the nine students as the monitor and four as the class committee. How many ways can you choose?
2169,90, 125 divided by a (A is a natural number), the remainder is the same. So what is the remainder of 8 1 divided by a?
22 N is a natural number. What is A If 10080A=2N*2N*2N is the minimum number?
A table consists of a table top and four legs. 1 m3 of wood can be used to make 50 desktops or 300 legs. There are 5 cubic meters of wood. How to distribute wood to match the table top and legs? * * * How many sets can you make?
A batch of goods is going to a certain place, and the goods are mainly rented by two kinds of cars, A and B. It is known that the situation of renting two kinds of cars in the past is as follows: The number of vehicles for goods A: 2 for the first time and 5 for the second time.
Number of B-type trucks: 3 and 6.
Cumulative freight tonnage:15.5,35
We are renting five A-class trucks and eight B-class trucks from this company, and we have delivered them at one time. How many tons are there?