"Officer Li, what should we do, should we just open this safe?" A young female police officer said. Pen ~ fun ~ pavilion www.biquge.info

Officer Li shook his head when he heard this, and then said, "No, the suspect has already indicated in his heart that this safe will explode after encountering violent vibrations, so it will not be good for you or me." ”

"Officer Li, you can't help but believe in the murderer too much, he said that the explosion will explode, so how can we solve the case?" The female police officer said unremittingly, since Officer Li took over this case, he has been timid everywhere, even if he is a police officer sent from a big city who has seen the world, he is too cautious in handling the case, and if the previous person in charge will definitely solve the case soon! Then it is possible to listen to the murderer and still do things according to the conditions proposed by the murderer?

"Have you ever studied chemistry?" Officer Lee said.

"I've learned, junior high school and high school, who hasn't learned?" The policewoman said.

"Then let me ask you, do you think a safe full of hydrogen will come to life after it is smashed?" Li asked.

"Officer Li, you can't bother me, hydrogen is unstable and will explode, but our tools are nothing more than things to pry the door, can this vibration cause the explosion of hydrogen?" The female police officer said with a confident look.

"Well, what you said is indeed right, then let me ask you again, if the compartment of the safe is still full of chlorine gas, will he explode if you shake it slightly?" Officer Lee said.

"Uh...... That shouldn't be the case, right? The female police officer was overwhelmed by Officer Li's question, and he said in a rambling voice.

"Hehe, put away your arrogance! I tell you, this safe will sound and explode due to violent vibration, it is not a mixed explosion of hydrogen and oxygen, but a light explosion of hydrogen and chlorine, haven't you noticed that this abandoned auto repair shop is brightly lit! What happens to hydrogen and chlorine under light conditions? Will explode! Speaking of which, you should ask me, why don't you just turn off the lights? Turn off the lights and you'll have a mixed explosion of hydrogen and oxygen. Officer Li scolded sternly, and he felt bored with these little police officers who didn't like him.

The female police officer knew that she had only learned a little bit, so she stopped talking and walked away.

Officer Li didn't have time to pay attention to this, and the situation in the safe he just said was written on the letter left by the murderer.

Officer Li calmed down and began to think about the murderer's riddle, at first glance it was a guessing puzzle, but after trying a few times, Officer Li found that it should be a math problem, and it was also a math problem to find patterns.

Officer Lee tried three times himself, and according to the conditions on the envelope, he first opened all the envelopes, and then let himself act as a second person to close the opening of the envelope every other envelope, and after doing all this, he pretended to be the third person and changed the state of the envelope every second envelope.

Some people said that Officer Li was declassifying, some people said that Officer Li was doing this superfluously, and some people said that Officer Li was pretending to be with us, and how we would laugh at him when he came out in a foreign way.

Officer Li can naturally hear them, but he doesn't take these words to heart, because Officer Li knows that if he doesn't try it himself, he will never get an answer just by looking at it, so practice is the fundamental way to solve the problem.

After doing these actions, Officer Lee found that the problem was not at all guessing which envelope would be opened in the end, but the number of times the envelope was moved, that is, the number of times the envelope was passed is equivalent to the number of factors of the envelope number. The numbers 1, 2, 3, and 6 are all factors of 6, so when an envelope has an even number of factors, it will be closed eventually, but when an envelope has an odd number of factors, it will eventually be opened. Most of the 100 envelopes containing the letter with the clues to the safe will eventually be closed, because the factors are originally in pairs, and in fact, the numbered envelopes with odd numbers are actually perfectly squared, which means that numbered envelopes like 4 and 9 will appear open from then on.

After finding this pattern, Officer Lee immediately found the exact square number of envelopes from a hundred envelopes: 1, 4, 9, 16, 25, 36, 49, 64, 81, 100.

Officer Lee quickly opened the numbered letterheads, and pulled out the papers with the clues of the insurance face from the letters, and arranged them in the order of the numbers on the envelopes. Officer Li silently read out the words on the paper in his mind: "The password is the first five envelopes that have been passed twice. ”

Officer Li fell into deep thought, the first five envelopes that had only been passive twice, there were a hundred people, how could it be possible that five envelopes had only been passive twice?

However, this kind of confusion only trapped Officer Li for five minutes, after all, Officer Li was a high-achieving student with a master's degree, and he had been a special soldier in the army for three years before, this kind of knowledge could not be difficult for him, and it was impossible for the murderer to calculate this.

Officer Lee soon realized that an envelope that had been double-touched could only be prime. (Prime numbers: also known as prime numbers, are numbers that are not divisible by other numbers other than 1 and itself, such as 2,3,5,7) so Officer Li quickly found the envelope of the first five prime numbers, which were 2,3,5,7 and 11, and the combination lock of this safe also appeared as expected, that is, 2,3,5,7,11.

After knowing the code, Officer Li quickly walked to the safe in the middle of the 100 envelopes, and the rest of the officers realized that Officer Li was about to start cracking the code, and everyone took a few steps back, it seems that these officers still don't trust Officer Li very much.

Officer Li glanced at them and shook his head disdainfully, Officer Li really didn't have much interest in these mediocre guys, and he took it upon himself to spin the passwords he got on the knobs of the safe.

After many police officers were so contemptuous of Officer Li, they all had a hope that Officer Li would be blown up.

But contrary to expectations, the explosion they were expecting did not happen. It seems that Officer Lee's inference is correct. Many police officers are dissatisfied when they see such a result, but no matter whether they are dissatisfied, they are powerful and awesome, what can we do.

I have to say that Officer Li is a thoughtful person, if it is said that ordinary people will be ecstatic after solving a puzzle with a lot of difficulty, they will quickly see what the mystery is, but Officer Li is different, perhaps it is the three-year special forces career that has made him develop a habit of living without leakage, he first took out a pair of rubber gloves from his pocket and brought it before taking the mystery in the safe.

Inside the safe was a small folded box, and Officer Li removed the lid of the box, and inside the box lay a neatly written letter, which read:

"Officer, when you see this letter, you prove that you have solved my answer, but my riddle is a very old Western story. The story says that there was a very rich man who died tragically, and he had 100 relatives who had the right to inherit, but he only wanted his little niece to get all the family property, and in order to prevent the little niece from being treated differently by his relatives, the old guy had to come up with a puzzle. He put all his credit cards in a safe. And 100 cabinets were placed around the safe, and the lawyer gave each of the 100 people a key and explained the puzzle. However, there is another condition, and that is that if someone can get the password to the safe without using his hands, then he will get all the property. Hehe, officer, can you unravel the secret of the cabinet? ”

After reading the letter, Officer Li felt that the last sentence was very familiar, and he always felt that he had heard it somewhere before, but he could not remember who said it anyway.

After flipping the letter back and forth countless times, Officer Li said in wonder, "Didn't you say that the clues of the murderer were caught in the safe again?" How could it not! ”

"Hehe, Officer Li, congratulations on solving the case!" Many police officers stepped forward to congratulate them, but when they learned that Officer Li had obtained no clues related to the suspect in the safe, everyone showed disappointed expressions.

The female policeman who was coldly spoken by Officer Li at the beginning said: "If you knew that this was the case, it would be better to open the safe directly and violently, what is the difference between you and my proposal?" ”

Officer Li smiled when he heard this, and said, "At least the person who solved the mystery of the suspect is me, not you, and you are not even as good as the suspect." ”

"You!" The policewoman who was told about the sore spot was glared at her angrily and couldn't say anything! Because what Officer Li said was true.

Officer Li smiled and shook his head at the appearance of the policewoman, then turned and left, leaving the crime scene to this group of mediocre people.