Plant trees on both sides of an 80-meter-long garden. Plant a tree every 8 meters and plant it at both ends. How many trees will be planted?

There are 63 people in the third grade science and technology activity group. In a regular competition for cutting and pasting car models and assembling airplane models, the teacher found that 42 students cut and pasted a car model and 34 students assembled an airplane model. Each student has completed at least one activity. Q: How many students have completed these two activities at the same time?

It takes 25 seconds for a train to pass through a 250-meter-long tunnel and 23 seconds for a 2 10-meter-long tunnel. If the train meets another train with a length of150m and a speed of 72km/h, how many minutes will it take to cross the train by mistake?

There are 40 balls with the same shape and size in a square box, including 10 red, yellow, blue and green balls. Q: How many balls must be taken out at least once to ensure that at least three of them have the same color?

According to the gas charging regulations of a city in China, the gas consumption within 6.9 yuan is 8 cubic meters or less per month, and the gas consumption exceeding 8 cubic meters is subject to a certain fee per cubic meter except 6.9 yuan. The gas cost of a hotel in June 5438+ 10 was 82.26 yuan, and the gas cost in August was 40.02 yuan. It is also known that the gas consumption in August is equivalent to 65438+17/ 15 in June, so it exceeds.

Fangfang made 14 flowers, Jingjing made 8 flowers, Fangfang gave Jingjing several flowers, and they both had as many flowers?

The store bought 6 boxes of balls and sold 8 balls every day for 5 days. The waiter rearranged it, and the remaining balls were just packed in 2 boxes. How many balls are there in each box?

The weight of an elephant is equal to the weight of four cows, the weight of one cow is equal to the weight of three ponies, and the weight of one pony is equal to the weight of three piglets. Q: How many piglets does an elephant weigh?

Mother asked Xiaohong to go to the store to buy five pencils and eight exercise books, and gave Xiaohong 3.8 yuan money according to the price. As a result, Xiaohong bought 8 pencils and 5 exercise books and got back 0.45 yuan. How much is a pencil?

Xiaoming 1 pm starts to do math problems. When he finished the problem, he found that it was not 2: 30, but the hour hand and the minute hand just exchanged positions with the title. Do you know how long it took Xiao Ming to do this problem?

Li Ming's father runs a fruit shop. According to the original pricing, every time he buys 1 kg of fruit, he can make a profit in 0.2 yuan. Later, Li Ming suggested that his father reduce the price. Results After the price reduction, the daily sales increased by 1 times, and the daily profit increased by 50%. Q: How much is the price reduction per kilogram of fruit?

There are 48 students in Xiao Qiang's class. In the math exam, Xiao Qiang got 15. Do you know where Xiao Qiang should rank in this exam?

There are 10 locks, and the keys are all messed up. How many times should I try to get each lock to have its own key?

Xiaohong mistyped the dividend 1 13 as 13 1 when calculating the division with remainder, so that the quotient was 2 more than the original, but the remainder was exactly the same. What are the correct divisors and remainders?

The engineering team needs to finish it within the specified date. If Team A does it, it can be finished on schedule. If Team B does it, it will be finished three days later than the stipulated date. If Party A and Party B cooperate for two days first, and then Team B does it alone, it can be completed as scheduled. How many days is the specified date?

In a rectangular ABCD, the diagonal passes through point O, BF=CF, and DF passes through AC at point E. Try to explain EC=2OE.

For a project, it takes 10 days for Team A to do it alone and 15 days for Team B to do it alone. Now, how many days does it take for two teams to work together?

Obviously, after taking out five white balls and five flower balls from the bag, there are 10 white balls and five flower balls left. How many white balls and flowers are there in the bag?

When buying pencils and notebooks in cultural goods stores in winter and winter, you can use all your money to buy 6 pencils and 1 1 notebooks, or 8 pencils and 7 notebooks. If you buy all the notebooks, how many can you buy?

There is a pile of iron and copper, each with exactly the same weight, and each with exactly the same weight. Three iron bars and five copper bars weigh 2 10g. Four iron blocks and 10 copper blocks weigh 380 grams. Q: How much does each piece of iron and copper weigh?

A glass factory consigned 250 boxes of glass, and the contract stipulated that the freight for each box was 20 yuan. If a box is damaged, it will not only pay the freight, but also compensate 100 yuan. At the time of settlement after delivery, * * * pays the freight of 4,400 yuan. How many cases of glass are damaged in the consignment?

Xiaohua divides the numbers 2 ~ 9 into 4 pairs, so that the sum of each pair is a prime number. Q * * * How many differences are there?

There is a batch of goods in the warehouse, and the mass ratio of the transported goods to the remaining goods is 2: 7. If 64 tons are transported again, the remaining goods are only three-fifths of the original goods in the warehouse. How many tons of original goods are there in the warehouse?

The students borrowed balls from the gym, nine from Class One and six from Class Two. How many balls were lost in the gym?

Use, and to represent three numbers, including += 15, += 12, += 18 and+= ().

Xiaoming and Xiaohua finish fishing. Xiao Ming said, "If you give me 1 fish you caught, my fish is twice as big as yours. If I give you 1, we will be the same. " Please work out how many fish each of them caught.

A train and a local train leave from Party A and Party B respectively at the same time. The express train is 75 kilometers per hour and the local train is 65 kilometers per hour. When we met, the express train traveled 40 kilometers more than the local train. How many kilometers is it between Party A and Party B?

On a foggy day, foxes, rabbits and bears went to sell masks. The fox said: if the bear sells 1 yuan, I will sell one from 4 yuan; If a bear 2 yuan sells one, I will sell one in 8 yuan; If a bear sells 3 yuan, I will sell 12 yuan. The rabbit said, "I sold it for half the price of the fox." As a result, they sold the same number of masks. A * * * sold 2 10 yuan, so how much did the fox sell?

Party A needs 10 hour, Party B needs 12 hour and Party C needs 15 hour to transport the goods to the warehouse. There are the same warehouses A and B, A starts to move the goods from warehouse A and warehouse B at the same time, C starts to help A move, then moves to half to help B move, and finally the goods from the two warehouses move at the same time. How long does it take C to help A and B respectively?

It takes a cat 1 minute to eat a fish. So, how many minutes does it take for 100 cats to eat 100 fish at the same time?

There are 52 apples in one basket and some pears in the other. If you take 18 pears from the pear basket, there are fewer pears than apples 12. How many pears are there in the pear basket?

There are 200 books on the A and B shelves, and the number of books on the A shelf is 3 times less than that on the B shelf, 16. How many books are there on shelves A and B?

Zhang bought the same pencil with the same money. 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?

Two cars, A and B, left AB at the same time. When they met, the distance they walked was 4: 3. After the meeting, B was faster than A by12km per hour, and A still walked at the original speed. As a result, the two cars arrived at the destination at the same time. It is known that B traveled 12 hours. How many kilometers is it between AB and China?

Milk candy and chocolate candy are mixed into a pile of candy. If 10 milk sugar is added, chocolate sugar accounts for 60% of the total. After adding 30 chocolate candy, chocolate candy accounts for 75% of the total, so how many milk candy are there in the original mixed candy? How many chocolates are there?

A group of pupils, there are 8 students in front of Li Ping and 5 students behind him. How many students are there in this group?

There are bananas, apples and oranges on the plate. Xiao Gang, Xiao Lin and Xiao Hong each took a different fruit. Xiao Gang said, "Everyone only eats one kind of fruit, and I don't eat oranges." Kobayashi said, "I don't eat apples or oranges." Who took the banana? Who took the oranges? Who took the apple?

A is processing a batch of parts. On the first day, half of this pile of parts were processed 10, and on the second day, the remaining half were processed 10, and the remaining 25 were unprocessed. Q: How many parts are there in this batch?

Three boxes of apples weigh 45 kilograms. A box of pears is 5 kilograms heavier than a box of apples. How much do three boxes of pears weigh?

Bright primary school held a winter sports competition, and the number of people who participated in the skipping competition was three times that of kicking the ball, 36 more than kicking the ball. How many people took part in skipping rope and kicking shuttlecock?

The original price of a movie ticket is several yuan. Now every ticket sold to 3 yuan, the audience increased by half, and the income increased by one fifth. What is the original price of a movie ticket?

After my brother gave my brother five pencils, there were six left. How many pencils does my brother have?

The two brothers went fishing, and one caught 23 fish. My brother caught three more fish than my brother. How many did brother catch?

There are 250 poles from the power plant to the urban area, and the distance between every two poles is 30 meters. How far is it from the power plant to the city?

Team A and Team B are building a 400-meter-long road. Team A completed four days from east to west and team B completed five days from west to east. Team a repairs more than team b every day 10 meter. How many meters do Team A and Team B repair every day?

The dial of the clock is marked with numbers 1, 2, 3, …,1,12 in a standard way, and n sectors of 120 are randomly made on it, each sector covers exactly 4 numbers, and every two covered numbers are different.

Xiaoming and Xiao Liang each have some glass balls. Xiao Ming said, "Your balls are less than mine 1/4!" Xiao Liang said, "If you can give me your 1/6, I will have two more than you." How many original glass balls does Xiaoming have?

The school wants to distribute 20 boxes of stationery to primary schools in mountainous areas, and has already distributed 10 boxes. How many more boxes do you want to send?

There is a column of numbers 2,4, 1, 2,4, 1, 2,4, 1, … What is the 25th number? What is the sum of these 25 numbers?

There are 25 questions in the math contest. If you answer a question correctly, you will get 4 points, and if you do a wrong question or not, you will get 2 points. A student completed 25 questions in the competition and got 88 points. He answered several questions correctly.

The express train and the local train go in opposite directions. The length of the express train is 280 meters and the length of the local train is 385 meters. The time for people sitting on the express train to see the slow train pass is 1 1 sec, so how many seconds does it take for people sitting on the slow train to see the express train pass?

Measure the depth of the swimming pool with a thin straight bamboo pole. After one end of the bamboo pole is inserted into the water (touching the bottom of the pool), the non-contact part is 120 cm long. Turn the bamboo pole around and insert it into the water (touch the bottom of the pool). At this time, the length of the non-wetted part is 30 cm. How deep is the swimming pool?

A, B and C are 280 meters apart in turn, and A, B and C walk 90 meters, 80 meters and 72 meters in turn every minute. If A, B and C start at the same time, how many minutes after A equals B for the first time?

Students line up to do exercises. From the front, Xiao Ming ranks fourth, from the back, Xiao Ming ranks fifth. How many people are there in this team?

Put the eggs in the basket. Suppose the number of eggs in the basket increases by 1 time per minute, and the basket will be full after 4 minutes. When is half a basket of eggs?

There are 6 times as many chickens as geese in He Lin's family, and 8 geese and 15 ducks in Abby Mallard. How many chickens does He Lin have?

Grandpa Xiaojun was born 29 times his age when he died. Grandpa Xiaojun presided over an academic meeting on 1955 and asked how old Grandpa Xiaojun was at that time.

Place a small cube with a side length of 4 decimeters on a cube with a side length of 5 decimeters (as shown in the figure). What is the surface area of this three-dimensional figure?

There are five couples in a circle. How many arrangements can make each couple's husband and wife adjacent?