Li Qieyou wants to learn from the crossing novels he has read and give Ma Zhou some problems such as nine curved beads and ropes.

But first, he didn't have such a jewel. Second, he used this topic to test the Tang people, which is self humiliation.

Because in the spring and Autumn period, Confucius had long given the answer, smearing grease on the line to make ants know it.

In the Tang Dynasty, there was also the "ant wears Jiuqu bead Fu", so others already knew about it. Li forgets worry and won't ask for trouble.

He gave Ma Zhou a logical reasoning problem: "I now have twelve copper coins, one of which is a fake money with lead. The weight is different. I give you a weighing instrument, which can only be weighed three times. If you want to find the fake money, ask how to operate it? Hey, brother Binwang, if you can't solve this problem, let's stop worshiping the teacher."

Weighing instrument is the balance in ancient China.

Bamboo pieces are used as beams, silk threads are used as lifting buttons, and a copper plate is hung at both ends. In the late spring and Autumn period, the manufacturing technology of scales and weights was quite sophisticated.

Li Qieyou deliberately gave Ma Zhou a difficult problem. He didn't believe that the literati of the Tang Dynasty would solve this logical reasoning problem.

The problem of thieves in Zhang Liang's house has baffled many hall leaders. Even Yang Zui can't think about it.

As soon as he worked out this problem, Ma Zhou's eyebrows locked and began to think seriously. And those farmers were even more confused and felt that there would be no answer to this question at all.

"Young man, this is deliberately embarrassing. How can you weigh it only three times and find fake money with different weights from twelve copper coins?"

"Why don't you weigh it with your hand first? Which copper coin do you think has different weight and then weigh it?"

"Is this problem even unsolvable? How can such a problem be difficult?"

"It seems that little Lang Jun doesn't want to take brother Ma Zhou as his disciple. That's why he deliberately creates such an unsolved problem."

Shopkeeper Ma, who was watching the excitement, was also baffled by the problem. He thought hard for a long time and felt that there was no solution to the problem.

Six copper coins to six copper coins... I don't know the weight... Five copper coins to five copper coins? Twelve copper coins... How to solve this problem?

"Young man, is there really an answer to this question?" shopkeeper Ma asked.

Li forgot to worry and nodded: "it's natural. Can I solve an unsolved problem and deliberately make it difficult for brother Binwang?"

meeting!

As soon as they ate melons, the people nodded, and even Niu Wu nodded. Angry Li forgetful almost kicked his fart stock.

This episode is amazing!

It's embarrassing for him to treat his husband like this.

Li forgot to worry about it, simply pulled the old village to prove it, whispered and told him the answer.

This problem is not difficult to solve.

First, twelve copper coins are divided into three groups, four in a group. Then put the first group and the second group in the copper plates on the left and right sides of the weighing instrument.

If balanced, then different copper coins are in the third group, if different

Er, for those interested students, Li Qieyou recommended Baidu to write out the complete solution process of this problem. It's too many words.

He told the old village Zheng about the problem-solving process, but he was confused about the old man. He nodded uncertainly after half a ring: "I see. This problem is really solvable."

In fact, the old man didn't understand anything. He divided and weighed again and again. He had already fainted.

It's so embarrassing that I can't even understand the answer.

So old Murakami nodded again: "I understand what Xiao Lang said. Ma Zhou, you can think about it."

The old village was pacing to the side, and was surrounded by the farmers of Dingzhou village.

"Murakami, tell us too. How do you call the copper money?"

"Don't worry, we won't tell Ma Zhou."

"Tell us the answer."

Tell your sister! The old man stared: "have you finished the work? Have you fed the horse? Go and brush the horse again. The rope on the car is tight, but you don't dare to drop these porcelain. You can't afford to sell it!"

With a reprimand, he bluffed the farmers and scattered to do things. The old village was waiting for the crowd to disperse before wiping the sweat on his forehead. This Li Xiaolang is really bad!

Since Li forgot to worry about this problem to Ma Zhou, Ma Zhou has become like a lost soul. Whether eating or riding in a carriage, he has been thinking about the problem of the twelve copper coins.

Even when the carriage returned to Chang'an City, he knew nothing and was completely immersed in the problem.

Li forgot to worry. He couldn't help but be ashamed. He wouldn't exert too much force and make Ma Zhou the future Prime Minister of the Tang Dynasty stupid, right? It would be a great sin to do that.

The carriage entered the city from Guanghua gate in the north of Chang'an City, crossed four streets and arrived at Chang'an west city. The Ma family's shop was opened in the west city.

This time from Yinzhou to Chang'an City, I only rested on the road for two nights, and ran eight or nine hundred miles in three days.

It was not until the carriage team drove to the door of the horse's porcelain shop under the guidance of the horse shopkeeper that the horse's shopkeeper finally breathed a sigh, and his reputation and gold signboard were finally preserved.

All the staff in the shop were asked to come out to unload the truck, and the farmers in Dingzhou village were also helping. Shopkeeper Ma invited Lao Cun Zheng and Li forgetful into the shop, and immediately asked the cashier to go to the warehouse to get the gold to pay the bill.

Six hundred dollars, equivalent to one hundred liang of gold. Shopkeeper Ma directly paid the fare with gold and left their address of Zhoucun, saying that he would ask them to help transport the goods next time.

After busy for a long time, he finally unloaded all the goods. Until this time, Ma Zhou sat still in the carriage, thinking about the twelve copper coins.

Seeing that it was getting late, Li forgot to worry and discussed with the old village. He simply went back to Dingzhou village today and went to the county government office of Chang'an County for delivery tomorrow. Anyway, they had more time and were not in a hurry.

After running around on the road for six or seven days, everyone was a little homesick. Lao Murakami nodded and agreed.

At this time, the evening drum had sounded, and the carriage team went out of the city at the golden gate next to the West City, bypassed the city wall and went straight to Huxian county.

As soon as it was dark, the four wheeled carriage team returned to Dingzhou village, which caused a uproar in the village.

There are 127 households in Dingzhou village, and 70 people have been transferred this spring, accounting for almost two-thirds of the village's village households.

Now the man in the family and his baby suddenly came back, which naturally attracted the whole village, old and young, to meet them.

The beauty boss also got the news and led Peilan out with a smile to welcome Li forgetful home.

"Forget worry, it's hard, you... Why are you so smelly! Go take a bath!" Su Changqing just prepared to come forward and talk to Li forget worry, but he couldn't help covering his nose with his hand and said with disgust.

Li forgot to worry. He smelled about himself. It's rotten for six or seven days

He smiled awkwardly and ran straight back to the backyard to take a bath.

Li forgot to worry and ran away, but forgot about Ma Zhou. The child was still sitting in the carriage, muttering like dementia