Li Yuzhe and Li Zhien held hands together, talking and laughing and preparing to take the subway home, but when they passed by Jiang Hudong's barbecue restaurant, the fragrance that instantly came out of it made Li Zhien swallow a mouthful of saliva involuntarily and said: "Wow, it's so fragrant." ”

After listening to Li Ji-eun's words, Li Yuzhe knew that because of himself, Li Ji-eun had not eaten meat for a long time, and basically Li Ji-eun's money bought him the kind of nutritious meal that was very expensive like batter, looking at Li Ji-eun's way of swallowing saliva, Li Yuzhe was distressed and immediately touched his pocket, but Li Yuzhe helplessly found that there was only 5,000 won left in his pocket for the journey home.

This made Li Yuzhe look at Li Zhien very frustrated and said: "I'm sorry Enbao, OPPA doesn't have money yet, so I can't let you eat meat yet, but please believe OPPA, in less than a year, OPPA will make you want to have anything?" Even if you want the stars in the sky, OPPA will do it for you. ”

Li Yuzhe's words moved Lee Ji-eun and said: "I don't want anything, I just need OPPA, as long as OPPA can stay by my side forever, it's enough." ”

With a smile, holding Li Zhien tightly in his arms, Li Yuzhe smiled and said, "Don't worry, I promise that I will always be by your side." ”

The road to the sky, to Li Yuzhe's surprise, just when Li Zhien and Li Yuzhe were about to walk to the subway station, they suddenly found that a business was doing an activity, the content of the activity was a math problem, the topic was:

A ten-digit abcdefghij (where each letter represents a number) that meets the following requirements:

The 1 digit a is divisible by 1

The 2-digit ab is divisible by 2

The 3-digit abc is divisible by 3

The 4-digit ABCD is divisible by 4

The 5-digit ABCDE is divisible by 5

The 6-digit abcdef is divisible by 6

The 7-digit abcdefg is divisible by 7

The 8-digit abcdefgh is divisible by 8

The 9-digit abcdefghi is divisible by 9

The 10-digit abcdefghij is divisible by 10

Find this 10-digit number

Request:

1. Have a detailed answer

2. Don't use some theorems that exceed the second year of junior high school!

This problem stumped a group of people at once, but because the merchant proposed that as long as he could solve this problem, he would not only give 500,000 won in cash, but also a high-end Hanbeef gift box.

Two attractive prizes, so that the merchant is still surrounded by a group of passers-by, among which there are a lot of college students and elites of various professions, this question is actually easy to be solved in their hands, but it is very helpless that the merchant is very bad at adding some theorems that cannot be used more than the second grade of junior high school, which will stump many masters, because most of them have learned the second theorem of junior high school has long been returned to the teacher.

And let a junior high school student do this problem, for the third grade of junior high school students this problem is too difficult, unless you are a math genius, otherwise this Olympiad problem, ordinary junior high school students you can't solve, even you can't understand.

Li Ji-eun, who is now in the third grade of junior high school, shook his head speechlessly and said to Li Yuzhe: "OMO, OPPA, I don't understand this question, who can solve it, it's too difficult, 500,000 won and that high-end Hanwoo suit is really not easy to take." ”

Listening to Li Zhien's words, Li Yuzhe's mind was full of numbers at this time, and in Li Zhien's opinion, this Olympiad math question, which was very difficult, Li Yuzhe felt very simple, and in less than two minutes, the answer was completely displayed in his mind in 3D mode.

At this time, the host's disappointed shout came from the stage: "Oh, this gentleman is wrong, it's a pity, this problem is just a junior high school Olympiad, is there really no one who can solve it?" What about the talents of my Republic of Korea? ”

The host's words made all the audience speechless, and they were inexplicably said that they were not talents, which made the audience very unhappy, but they were helpless, because what the other party said was right, that is, a junior high school Olympiad problem, and he really couldn't do it. Shaking his head helplessly, passers-by were all closed in their hearts, hoping that someone could solve the problem and kill the host's arrogance.

However, it's a pity that the host didn't even shout three times and still didn't come on the stage, and the host of the shopping mall on the stage shook his head with a wicked smile and pretended to be speechless: "There are still ten minutes left, if you haven't been on stage, this event, it's a pity that I'm going to announce the end." ”

Just when the host announced that the event was going to end, Li Yuzhe said to Li Ji-eun with a smile at this time: "Enbao, do you want to eat high-end Korean beef at night?" ”

Regarding Li Yuzhe's words, Li Zhien subconsciously nodded and said, "Of course I think about it, but that topic is really too difficult." ”

As soon as he finished speaking, Li Yuzhe laughed and walked to the stage: "It's not difficult, watch OPPA let Enbao eat Korean beef at night." ”

“OPPA！” Seeing Li Yuzhe on stage, Li Ji-eun was worried, because she knew that her OPPA should definitely not be that question, because he had been in a coma for four years, and now he has only been awake for a month.

Walking to the stage, at this time, the host saw someone coming up, and immediately said with joy: "OK, we finally have a 'talent' in the Republic of Korea, but I don't want to wait and watch the 'talent' go down lonely." ”

Walking up to Li Yuzhe, the host took the microphone and said to Li Yuzhe: "Hello, 'talent', I want to ask your name." ”

"Li Yuzhe!"

"Ah, it's Mr. Li Yuzhe, then I want to ask what your occupation and education are?"

"Unemployed, my education is that I didn't graduate from junior high school."

After Li Yuzhe finished speaking, the audience immediately burst into laughter, and the host on the stage also immediately smiled and said: "Li Yuzhe, don't make trouble, although this is a light activity, but you can't come up to be funny, do you know how many college students' 'talents' have fallen into the sand just now?" Okay, Li Yuzhe, I'll give you a souvenir, let's go down. ”

The host's words caused the audience to laugh, and Li Ji-eun watched Li Yuzhe tighten his little fist very worriedly.

But to the host's surprise, after listening to his mocking words, the young man in front of him only smiled slightly, and then looked at himself very calmly and said: "There are rules for your activities, and you won't be allowed to participate in them without a high school or university?" If there is, I will step down immediately, if not, why don't you dare to let me try, are you afraid that the prizes in your mall will be won by me? ”

After Li Yuzhe finished speaking, the host was dumbfounded, and someone in the audience immediately began to help Li Yuzhe coax: "Don't you dare, I'm afraid that he will win your prizes, and your shopping mall is too stingy." ”

If there is one, there is a second.

"Oh, do you want to hold an event in the mall, and after a while, no one will come up, and now people come up and don't dare to let people answer the question, what is the mall broken."

"That's it, close the door early!"

This didn't matter, and immediately a group of people began to laugh and shout: "Close the door!" Close the doors! ”

The voice was so loud that almost half of the East Gate could hear it, and the manager of the horrified shopping mall immediately came out to apologize to everyone, and then repeatedly said that it was the host's joke, and Li Yuzhe could solve the problem at any time.

After apologizing, the manager also immediately glared at the host, and the scene just now also frightened the host, he just wanted to tease the young man, but he didn't expect the other party to immediately fight back, unusually sharp, and also instigated the crowd at the scene, becoming the person who spoke for him, this alone, the host knew that the young man in front of him may not be a good stubble.

"I'm sorry Mr. Li Yuzhe, I made a very inappropriate joke just now, please don't mind, now please solve the problem." The host is also a master who can bend and stretch, and after speaking, he handed a pen to Park Ji-ho.

took the pen, Li Yuzhe said thank you very politely, which made the host nod in his heart, as if the other party was still more polite, and he may have been too much just now.

When Li Yuzhe slowly walked to the front of the board, I don't know why everyone at the scene secretly began to sweat for Li Yuzhe, and before he knew it, everyone in the audience was already on Li Yuzhe's side, hoping that Li Yuzhe could successfully solve the problem, and hoped that Li Yuzhe could get the prize.

Seeing that Li Yuzhe suddenly broke out with a strong cheering sound from the audience, this scene was still something that the host had not encountered, which made the host very puzzled, what did Li Yuzhe do to make so many people cheer for him, you must know that these people were still cursing the people who came on stage just now for not being able to do the question, and then laughing at them.

In fact, what the host didn't know was that Li Yuzhe just used a very simple method to separate the business from himself and become an opposite, so that the crowd that was not a business would of course immediately join Li Yuzhe's side.

Just when everyone was sweating for Li Yuzhe, Li Yuzhe began to write hard!

In the ten-digit abcdefghij, different letters represent different numbers. where a is a multiple of 1, two-digit ab is a multiple of 2, three-digit abc is a multiple of 3, four-digit abcd is a multiple of 4, five-digit abcde is a multiple of 5, six-digit abcdef is a multiple of 6, seven-digit abcdefg is a multiple of 7, eight-digit abcdefgh is a multiple of 8, nine-digit abcdefgh is a multiple of 9, and ten-digit abcdefghij is a multiple of 10. Find abcdefghij.

Step 1: j is 0; (The ten-digit abcdefghij is a multiple of 10)

Step 2: e is 5; (The five-digit abcde is a multiple of 5, but E cannot be 0)

Step 3: a, c, g, i are odd numbers, b, d, f, h are even numbers; (The remaining multiples of 2, 4, 6, and 8 are even)

Step 4: Try "eight-digit abcdefgh is a multiple of 8" FGH can be 216, 296, 416, 432, 472, 496, 632, 672, 816, 832, 872, 896, h can be 2 or 6;

Step 5: Try "six-digit ABCDEF is a multiple of 6" DEF can be 258, 456, 654, 852;

Step 6: Combine the above steps 4 and 5, defgh can be 25816, 25896, 45632, 45672, 65432, 65472, 85216, 85296;

Step 7: Combine "4-digit ABCD is a multiple of 4" and the results of steps 3 and 6, DEPHGH can be 25816, 25896, 65432, 65472;

Step 8: Combine "two-digit ab is a multiple of 2, three-digit abc is a multiple of 3" and the result of step 7, abcdefgh can be 14725896, 74125896, 18965432, 78965432, 98165432, 98765432, 18365472, 18965472, 38165472, 98165472;

Step 9: Combine "seven-digit ABCDEFG is a multiple of 7" and step 8 result, ABCDEFGH can be 38165472;

That is, the full ten digits are 3816547290.

After writing the last 0, Li Yuzhe threw the pen, and the host looked at the number exactly the same as the answer in his hand in surprise, and said dumbfounded: "It's completely correct." ”

As soon as I finished speaking!

"Ahh The Dongdaemun immediately resounded with the frantic cheers of a crowd of people