Jiang Yihan walked with the wind Shiyi, Nangong Hua walked together, who knew that he had not walked ten meters yet, and suddenly there was a sound, and the son stayed and asked a few people to stop and watch.

Not far behind him, there was a luxurious carriage, and a person got out of the car, it was actually the third master of Li who got the news and hurriedly returned, seeing it walking side by side, he couldn't help but get down from the car and salute with his fists, like a few sons to say hello.

A long indigo robe, the neckline and cuffs are inlaid with silver silk edge cloud pattern piping, and a blue auspicious cloud wide-brimmed brocade belt is tied around the waist, and the brocade belt is also embroidered with auspicious cloud patterns, and the black hair is tied up, wearing a small silver crown with jade inlaid on the top, and the white jade on the silver crown is crystal moist, which sets off the black and smooth of his hair, like satin.

The slender Danfeng eyes squinted slightly, which eased the originally calm face of the third master a lot.

But Li Sanye wanted to squeeze out a bright smile, but he had something to do in his heart for a few days, and he was no longer able to force a smile, with a tired and unbearable look in his eyes, he just wanted to sleep well, but unfortunately there was still something to do, so he had to squint slightly in the car just now, and at this time he was still in good spirits, and he couldn't help but hug his fists to the wind Shiyi and a few sons.

"It's a rare coincidence, a few sons are well! The third is late, please forgive me. ”

When the words fell, Feng Shiyi arrived first, "Yes!" What a coincidence the third master! It's rare that the third master has nothing to do! ”

"Feng Gongzi is laughing, no matter how big the matter is, how many sons do you have to listen to?"

Feng Shiyi's smiling face, but the tone of his voice was indeed a little complaining, "How dare you?" The third master is a busy man, he put us in the Deyue Building, but you, the master, are nowhere to be seen, do you still need to look for it? If you don't look for it, you won't be able to see it, and if you want to find it, you may not be able to see each other! ”

Li Sanye couldn't help but smile, these people have not stopped in the second end of the three days in Deyue Tower, not only to hide out for something, but also for their good, if they can't see it, they can't go out, in short, all kinds of people are dragging, they don't want to, they take the time to come out and make trouble.

Li Sanye couldn't help but persuade Feng Shiyi, "Feng Gongzi, although I have been here for some time, as the saying goes, there are people outside the world, and there is a sky outside the sky, so reckless, if you let the eighth master and the ninth master suffer, it is a sin." ”

Feng Shiyi looked at the third master of the calendar with a look of thinking about himself, and couldn't help but say unknowingly, "My son has always been stable, and the third master of the calendar should not add bad luck to my son, otherwise my son will not follow!" ”

The third master couldn't help but sincerely persuade again, "The son has made up his mind, he shouldn't have talked too much, it's just that everything is unpredictable, and I hope that the eighth master and the ninth master will think twice!" ”

When the words fell, Nangong Xing couldn't help but understand the meaning of the third master, and returned with confidence, "Don't worry!" Li Sanye, I will never blame you for not telling me about this matter, you have done your best, it is our own competition, it doesn't matter if you win or lose. ”

When Feng Shiyi heard this, he rolled his eyes, whoever wins and loses has no obligation to force you, doesn't it matter, does it matter?

The third master has already said, if they hesitate, three

I will say a few more words.

But now! It is redundant to persuade the third master of the calendar to do this, just to think about it afterwards, and he can't complain about Deyuelou, not to mention that no one can say what the result is.

Third Master Li nodded and said, "Since all the sons have agreed, and the Moon Shadow Princes have no objections,......"

Speaking of this, Jiang Yihan pursed his lips, rolled his eyes, and snorted,—— If I don't object, they all have to compare, obviously they are confident, and they want their aunt and grandmother to lose, these sons and daughters are not fuel-efficient lamps, but they forgot that my sister is not a master to be messed with."

Li Sanye then arrived, "That's it, Li Mou didn't say much, a few people want to try it better to go to the Moon Tower, it just so happens that I have ordered someone to arrange a position, several sons are distinguished guests, this outside is hot, not as warm in winter and cool in summer as in the Moon Tower, so that people can serve!" ”

Everyone couldn't help but nod their heads when they heard this, and they were all anxious to remember the better, and even the two of them were so surprised.

After a cup of tea, everyone came to Daodeyue Tower.

Feng Shiyi, as the first initiator, held this host to announce the start.

Nangong Hua asked the question within a limited time, as long as Jiang Yihan could answer it within the specified time, the correct answer would be a win.

This answer is written on paper beforehand so that you don't have to change the answer.

Nangong Hua believes that this question is not very difficult, but to answer it, it must be fast, accurate, and right!

As long as Jiang Yihan can answer correctly, he will win, omitted here, win two must not be in arrears, trustworthiness, Shen Xin is not only not prepared for this kind of want to think about it, don't believe it, want to do it, okay, rest it, think about it, don't believe it, want to rest and think about it.

Now there is a wall five feet thick, and two rats wear it together. Rats are one foot a day, and mice are also one foot a day. Rats are doubled daily, and mice are doubled daily. Q: When will we meet? How much do you wear?

The inscription is: There is a wall with a thickness of five feet (the old length unit, 1 foot = 10 inches), and two rats of the same size make holes from both sides of the wall at the same time, along a straight line. The rat scored 1 foot on the first day, and the progress of each day thereafter was twice that of the previous day; The mice also scored 1 foot on the first day, and the progress of each day after that was half that of the previous day. How many days can they meet? How many goals did each score when they met?

This question is published in the chapter "Surplus and Deficiency" in the famous classical mathematics masterpiece "Nine Chapters of Arithmetic". The Nine Chapters of Arithmetic was written around the first century A.D., but due to its age, its author and the exact date of its writing have not yet been verified. The book is organized in the form of a list of mathematical problems.

Legend has it that Han Xin, the general of the Han Dynasty, used a special method to count the number of soldiers. His method was to have the soldiers line up in three columns (three men in each row), then five columns (five men in each row), and finally seven columns (seven men in each row). As long as he knew the approximate number of soldiers in the group, he could deduce the exact number of soldiers in the group based on how many soldiers were in the last row of the three formations. If Han Xin had seen the three formations at that time, the number of soldiers in the last line was 2, 2, and 4 respectively, and he knew that this group of soldiers was about three or four hundred people, you could quickly deduce the number of soldiers in this group.

One hundred steamed buns and one hundred monks,

The three monks are even more indisputable,

The three monks are divided into one,

How many small and small monks are each? '

If translated into the vernacular, it means: There are 100 monks who divide 100 steamed buns, and they are exactly finished. If one big monk is divided into 3 and the small monk is divided into 3 people, how many big and small monks are there?

Method 1, with the method of solution:

Solution: Let the big monk have x people, then the small monk has (100-x) people, and the equation is listed according to the meaning of the question:

3x+1/3(100－x)=100

Solve the equation to obtain: x=25

Little monk: 100-25 = 75 people

Method 2, chicken and rabbit cage method:

(1) Assuming that 100 people are all great monks, how many steamed buns should they eat?

3×100=300 (pcs).

(2) How many more did you eat like this?

300-100=200 (pcs).

(3) Why did you eat 200 more? This is because the little monk is treated as a big monk. So when the little monk is regarded as a big monk, how many steamed buns does each little monk count?

3－1/3=8/3

(4) Each little monk counted 8/3 more steamed buns, a total of 200 more, so the little monk has:

200÷8/3=75 (person)

Great monk: 100-75=25 (person)

Method 3: Grouping method:

Since the big monk has 3 steamed buns, the small monk has 3 steamed buns. We can group 3 small monks and 1 big monk, so that each group of 4 monks is just divided into 4 steamed buns, then 100 monks are divided into a total of 100 ÷ (3+1) = 25 groups, because each group has 1 big monk, so there are 25 big monks; And because there are 3 small monks in each group, there are 25×3=75 small monks, which is the solution in the "Zhizhi Algorithm Tongzong", the original words are: 'Put a hundred monks as true, and divide them by three and one and get four, and get twenty-five monks.' The so-called 'real' is the 'dividend', and the 'law' is the 'divisor'. The columnar formula is:

100÷（3+1）=25，100-25=75。 The wisdom of the ancient working people of our country can be seen from this.

（4）. Knowing the monk with a bowl

There was a woman washing dishes by the river, and passers-by asked her why she was washing so many dishes? She replied: There are many guests in the house, and they share a rice bowl for every two people, a soup bowl for every three people, and a vegetable bowl for every four people, sharing 65 bowls. You can tell from the bowls in her house that she has a lot of them.

A came to the shepherd with a fat sheep and asked, "There are about 100 sheep in this flock you are driving", and the shepherd replied: "If this flock of sheep is doubled, and half of the original flock of sheep is added, and 1/4 of the original flock of sheep is added, even the fat sheep you are holding are counted, and it is just a hundred sheep." "Count how many sheep this shepherd has driven?

(8) Li Bai buys wine

Zhang Zhu, an astronomer and mathematician in the Tang Dynasty in China, once made up an arithmetic problem with the theme of "Li Bai drinking": "Li Bai walked on the street and carried a pot to buy wine." Double the store, see the flower and drink a bucket (bucket is an ancient wine set, can also be used as a unit of measurement). Sanyu shop and flowers, drink all the wine in the pot, how much wine is there? ”

Solution: The original amount of wine in the pot is required, and the change of the wine in the pot and the final result are told - three times to add (multiply by 2) and quantitatively reduce (weight loss bucket) and light. To solve this problem, we generally start from the result after the change, and use the inverse relationship between multiplication and division, addition and subtraction, and gradually reverse the reduction. "Sanyu shop and flowers, drink up the wine in the pot", it can be seen that there is a wine bucket in the pot when the three encounters the flower, then there is a wine bar 1÷2 buckets when the three encounters shop, then, there is 1 ÷ 2 + 1 bucket of wine when the second encounter flower, and there is wine (1÷2 + 1) ÷ 2 buckets when the second encounter shop, so there is wine (1÷2 + 1) ÷ 2 + 1 bucket when the flower is encountered, and there is wine when there is a store, that is, the calculation formula of the original wine in the pot is

[(1÷2+1)÷2+1] ÷2=7/8(bucket)

Therefore, there were 7/8 buckets of wine in the pot.

Set the original wine x bucket in the pot, and list the equation according to the title

2[2（2x-1）-1] -1=0

Solution, get x=7/8 (bucket)