"Three hundred and sixty lines, the best in the line, don't look down on those who sweep the streets, if there are no street sweepers, then the world will become dirty."

Next, Jiang Xiaobai challenged the math teacher: "You can ask me any question, mathematics, Chinese, English, physics, biology, chemistry, whatever you want." If I get it wrong, I'll drop out of school today and go home farming. ”

The math teacher first showed a somewhat overwhelmed expression, and then said to Jiang Xiaobai with an angry and wanted to laugh expression: "Ask questions casually? If you can learn what I just taught, even if you leave. ”

"Listen, I'm going to give you a question."

This math teacher wants to see what tricks Jiang Xiaobai is playing, if it was left in the past, Su Xiaohui would definitely stop Jiang Xiaobai, after all, Jiang Xiaobai's grades in the past were really poor and very poor, but now Jiang Xiaobai is different, and now Jiang Xiaobai is like a completely different person.

Last night, in less than five minutes, Jiang Xiaobai quickly asked and answered eighteen math application questions with Su Xiaohui.

The math teacher first came up with the first question to test Jiang Xiaobai to see if Jiang Xiaobai was really smart or fake smart: "The eleventh round of the Peony Cup football match, that is, each team needs to play eleven games, three points for one win, one point for a draw, and 0 points for a loss." The number of wins of the Guoxing Sangao club team is four times the number of losses, and the result is a total of 25 points. ”

Jiang Xiaobai did not hesitate, and blurted out directly: "First set up a win x field, a negative y field, then draw eleven minus x minus y field, x is equal to four y, column formula three x plus eleven minus x minus y is equal to twenty-five, and finally get x is equal to eight, y is equal to two, win eight games, lose two games, and draw one." ”

The math teacher was shocked, but he still nodded to Jiang Xiaobai with satisfaction, and then began to ask quick questions, wanting to see if Jiang Xiaobai was a genius or a talent: "In extracurricular activities, some students participated in the activities in groups, originally eight people in each group, and later regrouped, twelve people in each group, so that there were two fewer groups than the original, and how many students were there?" ”

Jiang Xiaobai still blurted out without hesitation: "First of all, there was originally an X group, so the number of people is eight X." Columnar parentheses x minus two parentheses multiplied by twelve equals eight x, and finally x equals six, for a total of forty-eight people. ”

The math teacher quickly asked the third math application question: "There is a high-speed wind band at an altitude of 10 kilometers above the earth's surface, suppose there are two planes flying in this wind band with the same speed, and one of the planes flies from A to B, the distance is 4 kilometers, and it takes 6.5 hours." At the same time, another plane flew from B to A, and it only took 5.2 hours, so what is the average speed of the plane and the wind? ”

Jiang Xiaobai quickly answered the third math application question: "Let's assume that the average speed of the aircraft is x kilometers per hour, and the wind speed is y kilometers per hour. As can be seen from the title, there is a headwind from A to B, and a tailwind from B to A. The equation can be columned, where x plus y is equal to four-fifths of five, and x minus y is equal to four-fifths of sixths, and the final result is that x will be nine-thirteenths and y is equal to thirteenths. ”

The math teacher quickly asked the fourth math application question: "A harvester harvests twelve hectares of wheat every day, and after cutting two-thirds of the wheat field, the efficiency is increased to five quarters of the original time, so it is completed one day earlier than the scheduled time. ”

"Cut, I'm too lazy to talk about the process, it's a waste of time to say that the process is a waste of time, and the devil knows when I'll suddenly wake up, so I don't want to waste time in vain." bar

Jiang Xiaobai quickly answered the fourth math application question: "There are 180 hectares of wheat land. ”

The math teacher quickly asked the fifth math application question: "A and B invested in a company in a ratio of 2 to 5, and agreed to go out in addition to various expenses, and the profits obtained were divided according to the proportion of investment, if the profit in the first year was 14,000 yuan, then how many yuan should A and B share respectively?" ”

Jiang Xiaobai quickly answered the fifth math application question: "A gets 4,000 yuan, and B gets 10,000 yuan." ”

The mathematics teacher quickly asked the sixth math application question: "Civil aviation regulations stipulate that a passenger in the ordinary class of the plane can carry a maximum of 20 kilograms of baggage for free, and the excess part is purchased at 15% of the air fare for each kilogram. A passenger who carries 35 kilograms of baggage on board pays a total of 1,323 yuan for the ticket and baggage check, and asks for the passenger's air ticket fare. ”

Jiang Xiaobai quickly answered the sixth math application question: "It should be charged at 1.5 percent per kilogram, not 15 percent, it is impossible to charge so high, if it is so high, the calculation result is not an integer, and it does not meet the actual charge in the air ticket." If you press 15 percent, the answer is what they say is 407, and if you press 1.5 percent, then the answer is what I said is 1,080 percent, which is an integer, which is also in line with the reality. ”

Although the math teacher has never done an airplane, but he has never eaten pork, has he never seen a pig run, he was really shocked by Jiang Xiaobai's answer, mathematics is to be applied to life, and Jiang Xiaobai obviously did it, and even did it very well, which made the math teacher feel incredible.

Even the classmates in the class cast unbelievable glances at Jiang Xiaobai, but only Su Xiaohui looked at Jiang Xiaobai with a nymphomaniac at this time.

The math teacher quickly asked the seventh math application question: "When a store sells two kinds of goods with the same price, one of them makes a profit of 25% and the other loses 25%, is the total profit or loss of the two goods?" ”

Jiang Xiaobai quickly answered the seventh math application question: "Loss." ”

The math teacher quickly asked the eighth math application question: "When a train passes through a 300-meter-long iron bridge, it takes 30 seconds to pass through it completely, and 10 seconds to pass it completely on the bridge, find the length of the train and its speed." ”

Jiang Xiaobai quickly answered the eighth math application question: "The length of the car is 150 meters, and the speed is 15 meters per hour." ”

The math teacher quickly asked the ninth math application question: "A middle school organized a spring outing for junior high school students, and originally planned to rent a number of 45-seater buses, but 15 people did not have seats; If you rent the same number of 60-seater buses, you will have one more car and the rest will be filled. What is the number of students in the first grade of junior high school? How many 45-seater buses were originally planned to be rented? ”

Jiang Xiaobai quickly answered the ninth math application question: "The number of first-year students is 240, and the plan is to rent 5 45-seater buses. ”

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