Obviously, there is no sign of gold in sight here, but given the heavy iron door, it is not impossible that the gold was placed there.

This kind of mechanism looks very high, in fact, Jonathan's uncle only slightly modified the basement, after all, the background of the copy is modern times, if you use pure machinery to make the mechanism, it is really troublesome, and the convenience brought by the electric revolution has made the cost of these things drop instantly.

But Ann Yizhi felt unexpectedly interesting, if it weren't for the fact that his house didn't have a basement, he would be a bit like making a similar puzzle for his children and grandchildren, and I don't know what the expression on their faces would be when they opened the 'treasure' and saw that it was full of unexplained 'magic books'......

Not to mention this, An Yizhi held the candlestick and shook it for a while, and saw that there were six other things like metal pillars in front of the iron door, and there was a red button on each pillar, which should be the mechanism to open the door.

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

'Whether you want to or not, you will always face situations where you can't tell whether it's true or not, and at this time, I want you to think about it.'

After this sentence, the handwriting began on a new line:

The six switches were divided into two groups, the lying group and the honesty group. The lying group will only tell lies, and the honest group will only tell the truth, pick out the two honest buttons, and light the light on the door. You only have one chance, and 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 hints.,6 out of 2 If you choose purely by luck, how strong does it take to be lucky......

And since there is only one chance, it is certainly not possible to try the exhaustive method one by one, and under such conditions there must be a hint of which two are the 'honest group'.

Ann pointed his finger and walked on, and he came to the nearest column, with the number 1 engraved in a steel-like manner above the red button, and a line of words on the right.

'5 is true, trust me'

This sentence should be a prompt, but only this one sentence is obviously incomprehensible, and it is estimated that all the pillars have prompts.

In order to avoid mistakes or forgetting, Ann Yizhi asked Mizushima Yumeko for a notebook, and then held the candlestick and looked at all the pillars separately, and copied all the sentences on the pillars that represented the prompts, and marked them with serial numbers.

Eventually, he got the following paragraph:

1: '5 is true, trust me'

2: 'I am the key that opens 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'

"This ...... Doesn't it seem like they have a clear relationship? ”

Jonathan glanced at the records in Ann's notebook and suddenly felt his head wide.

"Each has its own word, and although there is a connection between them, it is difficult to prove."

Yumeko Mizushima thinks the same way.

And our protagonist Ann is a finger......

This seems to be an elementary school level math Olympiad, at best, there are a few more variants......

–‐‐——–‐‐——

Olympiad math problems are different from ordinary math problems, it does not test the ability of arithmetic, but more of the ability of logic.

However, Olympiad problems can still be pushed flat with the sea of questions, mathematics has a lot of commonality, as long as you understand the routine, even if the person who asks the question changes, it will never change.

This puzzle is actually not difficult, as long as you use hypotheses and counter-proofs, you can find out who is honest and who is lying.

First of all, looking at the law, only 2 in the 6 paragraphs has no relationship with other numbers, so we start to prove with 2 as the starting point.

In the hint, there is only 3 who has something to do with 2, so let's assume that 3 is telling the truth, and 3 says that he is in the same group as 2, which means that 2 is also an honest group.

Conversely, if 3 is the lying group, then it is lying if it says 'I am in the same group as 2', and the truth is that 3 and 2 are not in the same group.

From the above two assumptions, do you see some problems?

Regardless of whether hypothesis 3 is lying or honest, 2 is always the honest group, so that the first correct one can be obtained, which is 2.

As I said before, mathematics has a strong commonality, as long as you understand the routine, the rest will be the same no matter how it changes.

Continuing down the order, assuming that 4 is telling the truth, then 6 that is not in a group with 4 is the lying group, and if 4 is lying, it says that it is not in a group with 6, but because it is a lie, it is actually the same group as 6.

Again, if you assume both positive and negative, you will find that no matter if 4 lies or is honest, 6 will always be the lying group, so that 6 can be ruled out.

The rest is still exactly the same thing, 5 says that he and 3 are not in the same group, whether he lies or not, 3 will always be a liar, and naturally 3 is excluded.

Then it's even simpler, because we have a correct 2 and two wrong ones are 6 and 3 respectively, and we just need to pick one correct one out of the remaining three or eliminate two wrong ones.

Using the conditions given, we can continue to push down, and since we already know that 6 is the lying group, then the sentence he says, '1 is honest', is of course also a lie, which means that 1 is actually a lying group.

In the same way, we just deduced from 6 that 1 is also a lying group, so 1 says that 5 is true, which naturally means that 5 is also a liar.

The final conclusion was reached, honest groups 2 and 4. Lying group 1, 3, 5, 6.

So as long as you find a way, the seemingly unsolvable puzzle is actually not difficult. The biggest challenge is to see if your brain can turn that corner.

One of the most important hints of this is that 'the liar must lie, and the honest must be honest', which is essentially the same as the story of 'two guards, one can only tell the truth and the other can only tell a lie', but with a few variables added to the difficulty, it does not change at all.

While Yumeko Mizushima and Jonathan were still frowning and wondering how to prove it, Ann closed the notebook with a snap of his fingers, walked to the column in a relaxed and happy manner, and reached out to press the red buttons on the No. 2 and No. 4 columns.

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

"Mr. An, how did you untie it?"

An Yizhi waved his hand:

"Let's go see if there's any gold."

He didn't bother to explain this to Jonathan, for these foreigners, this kind of Olympiad problem can be difficult for him, after all, even the multiplication of 15 times 7 needs to dig out a calculator, or don't expect the mathematical level of ordinary foreign people.

In fact, Jonathan didn't care too much about how to solve the problem, he spent money to ask Ann to come here just to find gold, and naturally gold is the most important thing.

The iron door looks heavy, but in fact it is just a piece of wood wrapped in iron, and it is not difficult to open it, and it is estimated that even if you don't solve the puzzle, you can easily cut it with an electric circular saw.

There's only one thing behind the gate, a wooden chest about the size of a safe, and yes, the shape is very similar to the one you'd see in RPGs.

Ann crouched down with one finger and looked at the keyhole of the treasure chest.

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

The watch was naturally the one left by Jonathan's uncle as a clue, and in addition to a piece of paper for prompting, there was also a piece of metal that folded and stored the oddly shaped, and that thing looked like a key used here.

An Yizhi did not guess wrong, he stuffed the metal piece into the lock hole like a bank card into an ATM, and without turning it, he heard a slight click, and the treasure chest opened.

Jonathan looked excited, and he hurriedly lifted the lid of the chest.

But there was no gold in the chest, not even anything that looked like metal. The empty treasure chest contained only a small wooden picture frame neatly arranged.

This makes An Yizhi very strange, it stands to reason that this should be gold, how can it be a photo frame?

Reaching out and taking it out of the treasure chest, the framed photographs could be seen in the flickering candle lighting of a young man in his thirties and three children of various ages, but no older than 10 years old.

They smiled happily at the camera......

Turn the picture frame over, and there is a line written 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 treasures I have left you'

An Yizhi handed the picture frame to Jonathan, who looked confused:

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

The latter looked at the photograph and then at the handwriting behind it, and his eyes seemed to be a little moist.

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

He hid and wiped the water from the corners of his eyes:

"There is no doubt that this is the treasure left to us by my uncle, there is nothing more important than family, compared to it, gold or something is not even as good as shit, thank you Mr. An."

Seeing Jonathan's touched mess, although it was a bit of a ruin to the atmosphere, An Yizhi still wanted to say.

- Big brother, does gold really exist......

However, looking at Jonathan's appearance, it is better for him to continue to be moved for a while, which directly shows that it is really a bit of a ruin to the atmosphere.

"Anyway, let's go up first, the air here isn't very fresh."

"Yes, Mr. An, you are right, I don't know if you have time tonight, please stay and let me thank you well."

Seeing that the other party was about to cry, An Yizhi still swallowed back the sentence 'just remember to pay more'.

The three of them returned the same way, and just returned to the corridor, and before they could say a word, they saw the lawyer James rushing all the way at a trot.

"Where have you been? I can't find anyone after looking for you for a long time? ”

Then he saw the picture frame Jonathan was holding in his hand.

"Uncle James, we found it, it was the treasure that my uncle left to our three brothers."

James waved his hand and said:

"Now is not the time to talk about this, something has happened."

This stunned the three of them, and then James said:

"It's a homicide."

Mom sells batches, and sure enough, she still wants to die!