This oil company has two oil depots, AB. Warehouse A has 180 tons of gasoline, and warehouse B has 120 tons of gasoline. Now the oil company wants to transport gasoline to two gas stations, A and B. It is known that the freight per ton from warehouse A to gas station A is 50 yuan, to gas station B in 40 yuan, to gas station A in 30 yuan and to gas station B in 60 yuan. It is known that station A needs 65438+.
) freight.
3. In the array (1, 1, 1) (2, 3, 4) (3, 5, 9) ..., the sum of the three numbers in the 40th group is ().
In a math exam, the average score of students A, B and C is 95, while the average score of students B, C and D is 97. It is known that A got 92 points and D got (
) points.
5, 40 people have to cross a big river, there is only one rubber boat, and at most 7 people can be gathered at a time. As we all know, it takes 5 minutes to cross the river by rubber boat once, while it takes them () minutes to cross the river once.
Three years ago, the total age of three students and teachers was exactly 90 years old. The total age of the three students this year is exactly equal to the age of the teacher, and the teacher will be () years old in three years.
7. There were 7 riddles for 57 people to guess, and only 237 people were guessed by * * * *. It is known that no one guessed wrong, 2 people guessed right 1, 6 people guessed right 2, 16 people guessed right 3, 8 people guessed right 5, as many people guessed right 4 and 6, and 7 people guessed right (
) people.
8. Mr. Wang's telephone number is seven digits. Add the first four digits to the last three digits to get 9424, and add the first three digits to the last four digits to get 450 1. Mr. Wang's telephone number is (
).
9. There are 6 barrels of oil, weighing 17, 18, 19, 2 1, 22 and 32kg respectively. They are engine oil and diesel oil. I don't know what oil is in each barrel, but I know that the total weight of engine oil is twice that of diesel oil, 17 and 17.
) oil, () oil, () oil.
10, Xiaohong goes from A to B, it takes 42 minutes to walk back and forth, and it takes 33 minutes to walk back by bike.
) minutes.
1 1. A bus and a truck leave from Party A and Party B at the same time. The bus travels 75 kilometers per hour and the truck travels 65 kilometers per hour. The two cars met at a distance of 25 kilometers from the midpoint. The distance between Party A and Party B is (
) kilometers.
12, three trucks transport coal 169 tons, vehicle a transports less 12 tons than vehicle b, vehicle c transports 7 tons more than vehicle a, and vehicle a transports () tons more.
13, the teacher wrote a five-digit number on his card. When Xiao Ming got it, it was still a five-digit number, but it was 258 12 1 less than the original five-digit number. The original five digits are (
).
14, there are eight numbers in a row, the average of the first six numbers is 96, the average of the last three numbers is 84, and the sixth number is ().
15, late at night, between noon 12: 00 and 12: 00, the minute hand on the clock face is at right angles to the hour hand ().
16, several students in an office bought the book grimm's fairy tales. Interestingly, the number of people who bought this book is exactly the same as the number of yuan in this book. More interestingly, the number of yuan in the unit price of this book is equal to the sum of the digits of the total yuan payable by these students. As we all know, the number of people who buy this book is odd. Every grimm's fairy tale (
) yuan.
17, the machinery factory processed a batch of parts. It was originally planned to process 80 parts per hour, but actually it processed 20 more parts per hour than originally planned. As a result, it was completed 5 hours ahead of schedule. This batch of parts * * (
) one.
18, five identical rectangles are spliced into a large rectangle, and the perimeter of the small rectangle is known as 12cm 19. The transportation company transports 1500 sets of glass tea sets for a factory, and the freight for each set is 2 yuan. For each damaged one, not only is there no freight, but also the compensation fee 78 yuan is deducted from the freight. As a result, the transportation company actually paid 2440 yuan.
) A tea set.
20. There are *** 100 chickens and rabbits. Chickens have 2 14 more legs than rabbits. Only chickens () and rabbits ().