Li Tai frowned and thought, the problem in front of him was really difficult.
The young people around him were also racking their brains and thinking.
The Tibetan man who asked the question said: "It is said that His Majesty the Tang Dynasty was revered as the Khan of Heaven. I didn't expect that the young people of the Tang Dynasty could not even solve such a simple question."
"Don't say such arrogant words!"
Someone shouted immediately.
The Tubo man smiled and said: "The villain is just talking about the current situation."
"Then how do you want to measure it?"
"What will you do if the villain says it?"
"..."
The Tibetans are dancing in front of you and mocking you.
As long as the provocation is in place, the Tubo man's goal will be achieved.
Of course there are people who are not convinced.
Now there are more people who want to beat up this Tubo man.
But everyone is polite in front of others, but I don’t know how cruel they are behind others.
Under the tough folk customs of the Tang Dynasty, someone might find this Tibetan man lying half-dead on Zhuque Street with bruises all over his body early tomorrow morning.
The wonderful Hungry Ghost Festival was completely ruined by this Tubo man.
The onlookers were whispering to each other and discussing constantly.
Someone has already gone to invite someone from the Imperial College.
Zhang Yang looked at this Tubo man with great interest.
Nowadays, Li Shimin is revered as the Khan of Heaven. This is the time when Li Shimin is satisfied with his ambition.
Li Shimin still didn't know that in the west of the Tang Dynasty, a man named Songtsen Gampo was also working hard to become stronger.
Moreover, Xue Yantuo is also constantly causing trouble.
Tuyuhun was also eager to try.
There are so many hidden dangers at the border.
Fortunately, Li Shimin was able to eat well and sleep well.
Soon, when Songtsen Gampo starts to set his sights on the Central Plains, he will lead Tubo and Li Shimin to arm-wrestle.
In addition, there is a plateau in Tubo. Even if Li Shimin wanted to send troops to attack Tubo, he would not be able to avoid altitude sickness.
Moreover, Songtsen Gampo was not a good person. He became the Tubo Zampu at the age of thirteen.
There have been constant wars within Tubo in the past two years. Songtsan Gampo has been upgrading and accumulating experience for so long. In one year, Tubo will be unified. Songtsan Gampo's next target is the Tang Dynasty.
He was young and now he was the king of Tubo, so he needed a battle to establish his authority.
There is nothing better than using the Tang Dynasty to give Songtsan Gampo his prestige.
Military affairs are too complicated, so what does they have to do with me?
Seeing more and more people watching, Li Yue whispered to Zhang Yang, "Is it really possible to know how tall this tree is without touching it?"
Zhang Yang sighed: "How do I know?"
Looking at Zhang Yang with a frown, Li Yue said: "You must know."
After getting to know each other for such a long time, Li Yue discovered that Zhang Yang had a very special ability.
No matter how difficult the problem is, it will be solved easily in Zhang Yang's hands.
So much so that Li Yue was in a state of lying flat for a long time.
Life is dull and worry-free.
"Say it or not."
Feeling Li Yue's little hands tugging at the flesh of her arm.
This strength...
Zhang Yang whispered: "Harder... yes, harder."
"..."
"You!" Li Yue raised her fist and hit Zhang Yang like raindrops.
However, Li Yue never learned how to curse, so she could only express her anger with small fists.
Zhang Yang said in a low voice: "I went to help them just for your sake. You have to think about it, even if I go to help them, I won't get any gratitude from these people."
As he spoke, Zhang Yang glanced at the young people watching.
They will only ridicule the Tibetan man's arrogance after the mystery is solved.
As for how the puzzle is solved, no one cares at all.
Zhang Yang usually avoids such things.
To make your little wife unhappy is to make yourself unhappy.
Zhang Yang looked up at the evening sun.
I picked up a fairly straight wooden stick from the ground.
The height of the tree can be found by finding a few known conditions.
Zhang Yang picked out a guy in the crowd who looked anxious and said, "Brother, please take a step to speak."
The young man looked at Zhang Yang curiously and said, "May I ask what's wrong?"
Zhang Yang whispered to him: "Actually, this puzzle can be solved."
"How to solve it?"
Zhang Yang stuck a wooden stick on the ground and said, "Now measure the length of this piece of wood."
The young man tried it with a measuring stick and said: "There are three in a foot!"
Zhang Yang said to him: "You will insert this wooden stick on the edge of the tree later. Remember to keep it aligned with the tree without too much deviation."
The young man nodded blankly, still looking at Zhang Yang with a strange expression.
Zhang Yang marked the edge where the stick was inserted into the ground, and then said to him: "You measure the height of this stick. Later, you insert the stick there, measure the height of the stick, and then measure the shadow of the stick."
length."
"Then you can measure the shadow of that tree. Do you understand what I mean?"
The young man scratched his head and said, "I understand somewhat, please explain it more clearly."
"..."
Zhang Yang glanced at Li Yue again.
Li Yue squinted her eyes and smiled. She said to her heart, "I knew you could do it." There was pride on her face.
The math skills of the person in front of me are a bit unsatisfactory.
The sun is about to set.
Zhang Yang added: "At the same horizontal position, when the reference object remains unchanged, the distance between the shadow and the shadow is the same. Under the influence of light, our shadow changes with the angle of the light, but your and my height will not change. When
If we stand side by side, the length of our shadows will also change at the same time."
This young man seemed to have a sudden enlightenment.
Zhang Yang took a stick and wrote a formula on the ground and said: "Calculate the height of the stick and the length of the shadow of the stick, get the ratio of the two, and then measure the shadow of the tree. Assume that the height of the tree is A."
"The length of the tree's shadow is calculated into the ratio between the two, and then we work backwards to calculate the height of the tree. There will be some error, but it won't be too big."
"Yes, yes...that's it."
He almost jumped up with excitement, hurriedly walked into the crowd and shouted: "I know how to solve it."
Li Yue returned to Zhang Yang and said, "Do you think he can untie it?"
Zhang Yang said: "It should be okay."
The tree puzzle was worked out.
Everyone suddenly realized that this was actually not difficult at all.
The young man who solved the puzzle was smiling from ear to ear as he listened to the compliments from the people around him.
"Okay, you Tubo man! I call you arrogant!"
"You dare to act wild here, do you really think we haven't learned mathematics?"
"It turns out it's just a small skill. I thought it was so difficult."
…
As expected, they didn't care at all about how the problem was solved, they only thought about how to regain their previous face.
The Tibetan man saw that he was a little embarrassed at this moment, so he took out another jade pendant and said: "These two jade pendants are a pair. If you are really talented and knowledgeable, why not try another question? I will give these two jade pendants to the solution."
The person in question."
The Tubo man stepped forward to stop Zhang Yang. He said in unfamiliar Guanzhong dialect: "This friend, I just saw you and told him how to solve the problem."
The buddy who had just solved the problem also came forward and said, "Brother, since you solved one problem, why not solve another one."
Standing back, Zhang Yang looked at the Tubo man and said, "Then come up with the question."
For a time, this place became the focus of the entire Qujiang Pool.
More and more people are watching.
The Tubo man thought for a long time and said: "There was once a man from the Western Regions who could cut off a small piece of gold from a large square piece of gold, and the shape of the original gold remained unchanged."
Someone passed the question on by word of mouth, and it was already completely dark.
Zhang Yang killed a mosquito that didn't know whether to live or die, and flicked the mosquito's body gracefully.
"Are you done?"
The Tubo man bowed to Zhang Yang and said, "The villain has finished speaking. Please answer the question."
Zhang Yang made a square from the mud on the ground and said, "For example, this is a gold nugget."
While talking, Zhang Yang took out a piece of wood and cut several lines on the square, and then reassembled the cut pieces of clay.
Under the eyes of everyone, this square piece of mud was reorganized and indeed there was an extra piece in the lower left corner.
Zhang Yang cut off the extra piece and said, "This is the answer."
The wooden strips were cut again, and the square was divided into several pieces again. The second time the square was cut in the same way, another small square appeared.
The original square shape remains unchanged.
It was quiet all around, everyone's eyes were on the square that Zhang Yang was playing with.