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. It is understood that it takes 5 minutes to cross the river once by rubber boat, and it takes () minutes for them to cross the river once.
Three years ago, the total age of three students and teachers was exactly 90 years old. This year, the total age of the three students is exactly equal to the age of the teacher. Three years later, the teacher was () years old.
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, 17.
) oil, () oil, () oil.
10, Xiaohong goes from A to B, and it takes 42 minutes to walk back and forth. When she goes, it takes 33 minutes to walk back by bike, and it takes (
) minutes.
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