Chapter 1215

Obviously, there is no sign of gold here, but considering the heavy iron door, it is not impossible for gold to be placed there.

This kind of mechanism looks very high. In fact, Jonathan's uncle only slightly transformed the basement. After all, the background of the copy is modern. It is really troublesome to make the mechanism with pure machinery, and the convenience brought by the electric revolution makes the cost of these things drop instantly.

But an Yizhi felt surprised and interesting. If his home didn't have a basement, he was a bit like making a similar puzzle for his future generations. He didn't know what expression would be on his face when they opened the "treasure" and saw that it was full of a pile of unknown egg "magic books"

Not to mention this, an Yi pointed to the candlestick and shook it. He saw that there were six things like metal columns in front of the iron door. There was a red button on each column, which should be the mechanism for opening the door.

He walked two steps forward and saw a metal plate embedded in the floor under his feet, and there were words on the metal plate.

"Whether you like it or not, you will always face a situation where you can't judge whether it is true or not. At this time, I hope you can think more about it."

After this sentence, another line in the handwriting reads:

"The six switches are divided into two groups, the lying group and the honest group. The lying group can only lie, and the honest group can only tell the truth. Pick out two honest buttons and turn on the light on the door. You only have one chance. If you choose the wrong one, the door will never open. "

This sentence should be the rules of the game, but think about it carefully. There should be other tips. If you choose 2 out of 6, how strong luck it takes to win at one time

Moreover, since there is only one chance, the exhaustive method will certainly not work one by one. Under such conditions, there must be a hint to explain which two are the "honesty group".

An Yizhi continued to walk forward. He came to the nearest column and engraved the number 1 above the red button with a method similar to steel seal, and a line of words on the right.

"5 it's true, trust me"

This sentence should be a hint, but only such a sentence is obviously incomprehensible. It is estimated that there are hints on all columns.

In order to avoid remembering or forgetting, an Yizhi asked Shuidao Mengzi for a notebook, then looked at all the columns with a candlestick, copied the sentences representing the prompt on the column, and marked the serial number on it.

Finally, he got the following paragraph:

1: "5 it's true, trust me"

2: "I am the key to the door

3: "I'm in the same group as 2"

4: "I'm not in the same group as 6"

5: "I'm not in the same group as 3"

6: '1 is honest'

"Well... It doesn't seem to be able to sort out the relationship between them?"

Jonathan glanced at Ann's notebook and felt his head big.

"Everyone sticks to their own words. Although they are related to each other, it is difficult to prove it."

So does Mizushima Mengzi.

And our protagonist an Yizhi

This seems to be an Olympiad math problem at the primary school level, but there are some more variants at best

–‐‐——–‐‐——

The Mathematical Olympiad problem is different from the general mathematical problem. It tests not the operation ability, but the logic ability.

However, the Mathematical Olympiad problem can still be slightly pushed by the sea battle. Mathematics has great commonality. As long as you understand the routine, even if the problem maker changes again, it will never change.

In fact, this puzzle is not difficult. As long as you use hypothesis and counter evidence, you can find out who is honest and who is lying.

First, let's look at the law. Only 2 of the six paragraphs has no relationship with other numbers. Therefore, we start to prove with 2 as the origin.

In the prompt, only 3 has something to do with 2. Let's assume that 3 is telling the truth, and 3 says that he and 2 are the same group, which means that 2 is also an honest group.

Conversely, if 3 is a liar group, it is a liar to say 'I and 2 are the same group'. The truth is that 3 and 2 are not the same group.

Do you see some problems through the above two assumptions?

Whether hypothesis 3 is lying or honest, 2 is always an honest group, so you can get the first correct, that is, 2.

As mentioned before, mathematics has a strong commonality. As long as you understand the routine, the rest will change no matter how they change.

Continue to push down in order. If 4 is telling the truth, then 6 not in group 4 is a lying group. If 4 is telling a lie, it says it is not in group 6, but because it is a lie, it is actually in the same group as 6.

If it is still a positive and negative hypothesis, you will find that whether 4 is lying or honest, 6 is always a lying group, so 6 can be excluded.

Next, it is exactly the same truth. 5 says that he and 3 are not in the same group. No matter whether he lies or not, 3 will always be a liar, which naturally excludes 3.

Next, it's even simpler, because we have got a correct 2. The two errors are 6 and 3 respectively. We only need to select one correct or exclude two errors from the remaining three.

Use the given conditions to continue pushing down. Since we already know that 6 is a lying group, the sentence he said '1 is honest' is also a lie, which means that 1 is actually a lying group.

Similarly, we just inferred from 6 that 1 is also a liar group, so if 1 says 5 is true, it is also a liar, which means 5 is also a liar.

Finally, it is concluded that honesty groups 2 and 4. Lying groups 1, 3, 5, 6.

So as long as we find a way, the seemingly unsolved puzzle is not difficult. The biggest difficulty is to see if your brain can turn that corner.

One of the most important hints is that "a liar must lie, and an honest man must be honest". The essence is the same as the story of "two guards, one can only tell the truth and the other can only lie". Only some variables are added to make it more difficult, but there is no change at all.

When Shuidao Mengzi and Jonathan were still frowning to figure out how to prove it, Ann snapped her notebook, walked to the column happily and reached out to press the red buttons of columns 2 and 4.

At the same time, the three saw the two lights on above the iron door frame. With the sound of the machine opening, the heavy iron door opened a crack by itself.

"Mr. ANN, how did you untie it“

An Yizhi waved his hand:

"Let's go and see if there is gold."

He didn't bother to explain this to Jonathan. For these foreigners, this kind of Mathematical Olympiad problem can be very difficult. After all, even the multiplication of 15 times 7 needs a calculator. Don't expect the math level of ordinary foreign people.

In fact, Jonathan didn't care much about how to solve the problem. He spent money to ask for peace in order to find gold. Naturally, gold is the top priority.

The iron door looks heavy. In fact, it's just iron covered with wood. It's easy to open it. It's estimated that it can be easily cut with an electric circular saw even if it doesn't solve the mystery.

There is only one thing behind the gate, a wooden treasure box about the size of a safe. Yes, the shape is very similar to that seen in RPG Games.

Ann squatted down and looked at the keyhole of the treasure chest.

"Mr. Jonathan, you can open that watch with the piece of metal in it."

Naturally, the watch is the one left by Jonathan's uncle as a clue. There is not only a piece of paper for prompt, but also a piece of metal with strange shape. It looks like a key used here.

An Yizhi did not guess wrong. He stuffed the metal sheet into the lock hole like a bank card into the ATM. Without turning, he heard a slight click, and the treasure box opened.

Jonathan looked very excited. He quickly opened the lid of the treasure chest.

But there was no gold in treasure chest, not even anything that looked like metal. There was only a small wooden photo frame in empty treasure chest.

This makes an Yizhi very strange. It should be gold. How can it be a picture frame?

Reach out and take it out of the treasure box. In the flickering candle lighting, you can see the picture in the picture frame. It is a young man in his thirties and three children of different ages, but the largest is no more than 10 years old.

They smiled happily at the camera

Turn the picture frame over, and there is a line of words on the back of the picture frame: "the truth is often only a piece of paper away from you. All you need is the courage to tear off this layer of paper. These are the wealth I left to you."

Ann pointed to the picture frame and handed it to Jonathan, who looked confused:

"Mr. Jonathan, you should have some impression of this picture."

The latter looked at the photos and the handwriting at the back. His eyes seemed wet.

"God, i... I was blinded by gold."

He concealed the water stains from the corners of his eyes:

"There is no doubt that this is the treasure that my uncle left us. Nothing is more important than my family. Compared with it, gold is not even as good as dog shit. Thank you, Mr. an."

Looking at Jonathan's mess, although it was a little damaging to the atmosphere, an Yizhi still wanted to say.

——Brother, gold really exists

But looking at Jonathan's appearance, it's better to let him continue to move for a while, which directly shows that it's a little damaging to the atmosphere.

"Anyway, let's go up first. The air here is not very fresh."

"Yes, Mr. an, you're right. I don't know if you have time tonight. Please stay and let me thank you."

Seeing that the other party was about to cry, an Yizhi swallowed the sentence "just remember to make more money".

The three returned along the original road. They had just returned to the corridor. Before they could say a word, they saw lawyer James trotting all the way.

"Where have you been? I haven't been able to find anyone for a long time?"

Then he saw the picture frame in Jonathan's hand.

"Uncle James, we found it. It's the treasure that uncle left to our three brothers."

James waved and said:

"This is not the time to talk about this. Something happened."

This stunned the three, and then James said:

"It was a murder."

Mom sold the batch, and sure enough, she still wanted to die!