25 cases of math problems in life ※ Big-headed son and small-headed father * * * opened a McDonald's shop together. They calculated the turnover of one day together in the evening and found that there was 32. 13 yuan on the books. It was later discovered that the decimal point of a sum of money was wrong. It turns out that () ※ Teacher Wang bought 72 pens for students, and * * * spent □67.9△ yuan. How much is each pen? Smile and finish a bottle of juice four times. Drink one sixth of a bottle of juice for the first time, and then fill it with water. ※: The second time I drank a third bottle, then filled it with water, and the third time I drank half a bottle and filled it with water; Gulp it off for the fourth time. Drink less juice and drink less water. A primary school numbers each student, with the numbers of boys ending in 1 and girls ending in 2. For example, 964 10252 means "I entered school in 1996, and my classmates are girls. ※. Then 0111kloc-0/01indicates that the student is a () student in Class () of Grade (), and his student number is (). If you are in Class 36, Grade 6, please fill in your student number in the above way. There are two ways to pay for PHS mobile phones in a certain area: (1) free of monthly fee. 0.25 yuan per minute, basic monthly consumption 15 yuan. ※: (2) Pay the monthly fee of 18 yuan per month, and the call is 0. 1 yuan per minute. Please calculate the monthly call time as 100 minutes, 200 minutes. Which way is more cost-effective? If your father also has a PHS, which way do you think is better for him to pay? Why? The tap water charge in a city is as follows: the monthly water consumption of each household15t (including15t) is charged according to one ton of 0.9 yuan; If it exceeds 15 ton, it will be charged as one ton in 3 yuan. A family used 2 1 ton of water in April. ※. How much should it pay for water? Once, three friends, A, B and C, took a taxi to go out on business. When they set out, they agreed to share the fare reasonably. Get off 6 km early, 12 km, 18 km, pay the fare to 36 yuan. ※. How much fare do the three of them have to bear? A peasant woman is carrying a basket of eggs to sell. The first time she sold half and more eggs, the second time she sold the remaining half and more, the third time she sold the remaining half and more, and finally there was an egg left in the basket. How many eggs does that peasant woman have? ※? There are five boxes of biscuits in a food store. If you take out 15 kg from each box, the remaining five boxes of biscuits are exactly the original two boxes. How many kilograms of biscuits are there in each box? ※? Xiao Liang and his father went for an outing by taxi. 5 yuan will be charged within 10 km, and 0.3 yuan will be charged every km beyond 10 km. When they get off the bus, Xiao Liang will pay 9.2 yuan's taxi fare. How many kilometers did they walk by taxi? ※? Fifty-two students from Class Six (1) went to the aquarium. At noon, the teacher asked Beibei to buy drinks for everyone. Because I bought a lot, my aunt gave me a discount to buy one box and get one free. ※. * * * paid four boxes, one for each person. Do you know how many boxes there are in each box of drinks? A primary school wants to buy 60 footballs, and now there are three stores A, B and C to choose from. The football prices of the three stores are all within 25 yuan, but the preferential measures of each store are different: Store A: buy 10 football, get two free, and if it is lower than 10, don't send it. Store B: Every football 5 yuan. ※: Shop C: After shopping in 200 yuan, I will return to 30 yuan. In order to save money, which store should I go to to buy a primary school? Why? The blaster wants to blow up an old bridge. According to the blasting situation, the safe distance is 70 meters (people beyond 70 meters must evacuate). Here are some known data. The personnel speed is 7m/s, and the fuze burning speed is10.3cm/s. How long should the fuse take to ensure safety? ※? A middle school library bought three hardcover editions and five paperback editions of A Chinese Dictionary, which cost 27.8 yuan. If you exchange one hardcover for two paperbacks, you have to pay 1 yuan. ※. How much is each hardcover dictionary? There are three classes a, b and c in grade six. There are 50 students in Class A and Class B, 70 students in Class B and Class C, and 60 students in Class A and Class C. How many students are there in each class? ※? Xiao Wanghua 140 yuan bought a coat, a hat and a pair of shoes. Coat be more expensive than hat, 90 yuan. ※. Coats and hats are more expensive than shoes 120 yuan. What is the price of a pair of shoes? Party A, Party B and Party C each went out to 27 yuan to buy a batch of exercise books, and each went out to 9 yuan. Because Party B and Party C got 15 more copies than Party A, they each gave Party A 1.5 yuan. ※. How many exercise books did the three partners buy? A primary school organized 325 teachers and students to go for a spring outing. It is known that the bus is limited to 40 people, each bus is limited to 1000 yuan per day, and the bus is limited to 25 people in 650 yuan per day. How to rent a car? ※? There are two job advertisements. The salary of Company A adopts the annual salary system, with the starting salary of 1 10,000 yuan per year, and then it will increase year by year, and the 600 yuan will be increased every year. Company B adopts semi-annual salary system, with a starting salary of 5000 yuan every six months. ※. After that, 200 yuan will be added every six months. Which company offers more favorable terms? A and B are going to explore the desert. They go deep into the desert for 20 kilometers every day. It is known that each person can carry food and water for up to 24 days. If you are not allowed to store some food on the way, ask: how many kilometers can one of them go deep into the desert? ※? What if some food can be stored on the way back? Xiao Qiang, Xiao Wei and Xiaohua helped Li Nainai deliver two suitcases with the same weight to the station at a distance of 1.5km. They decided to split the task of running luggage equally, and each person could only carry one suitcase at a time. How many kilometers did everyone run on average? ※? Party A, Party B and Party C run a 60-meter race. When Party A crossed the finish line, it was 10 meters ahead of Party B and 20 meters ahead of Party C. If the speed of each race remains the same, how many meters ahead of Party C will Party B cross the finish line? ※? Aunt Li took 120 yuan to the market to buy meat. Because the price of meat was reduced by one fifth, she bought 5 kilograms more meat than the same money last time. Q: What is the original price per kilogram of meat? ※? The original price of movie tickets was several yuan. Now, the price of each ticket is reduced by 3 yuan, the audience has increased by half, and the income has also increased by one-fifth. How much is a movie ticket? ※? Party A and Party B have deposited RMB 9,600 in the bank. If they respectively withdraw 40% of their own deposits and then withdraw 120 yuan from Party B's deposits to Party A, then their deposits are equal. How much money did Party B originally save? ※?