There is a family next door to the Li family, which is also a mud house and a mud courtyard, which is very poor.

In general, in this village, in addition to the mansion of the old scholar, only the house of the Li Zheng family can be seen, and the other families are poorer than the other.

An old woman sat in the dusty courtyard, holding a smoking gun, and was smoking a cigarette.

The smell of smoke is very choking, and it is estimated that it is the worst tobacco leaf.

Sensing the sight of the people looking outside the door, the old woman lazily lifted her eyelids, glanced at them carelessly, and then continued to smoke the gun, ignoring them.

"Most of the people in the village seem to be old people." Bai Youwei whispered to Shen Mo.

Whether it is an old scholar, or Li Zheng and Ma, they are all old people over sixty years old.

Even if I saw Li Zheng's son and daughter-in-law in the mourning hall before, they were in their early forties, and the younger ones were children, but there were no young people in their teens or twenties.

"This place is remote and poor, how can the young stay here?" The old woman in the courtyard suddenly opened her mouth, "Those who can walk are gone, and those who stay are only the old people who can't walk, and the old bachelors who can't marry their daughters-in-law." ”

Several people were stunned for a moment, they didn't expect this NPC to give information so neatly.

Du Lai walked into the courtyard and asked politely, "Do you know the Li family next door?" ”

When the old woman heard this, she smiled silently, and the wrinkles on her face were like deep ravines, giving people an extremely uncomfortable feeling.

Then there was a coughing sound in the house, and then they heard an old man say:

"I've been sick for a long time, when will my daughters come back to see me?"

The old woman took the cigarette gun, knocked lightly on the ground, and said to the old man in the house, "Didn't the eldest girl just come to see you yesterday?" ”

"Why don't you see the three of them come to see me?"

The old woman sneered and said, "That's not easy, the eldest daughter returns once every five days, the second daughter returns once every four days, and the younger daughter returns once every three days, who knows when they will be able to come to see you together." ”

The words returned in his mouth, but his eyes looked at Du Lai faintly, as well as Fu Miaoxue, Shen Mo, and Bai Youwei behind him.

Everyone understands that this is the NPC who is giving them the question.

Bai Youwei breathed a sigh of relief in her heart.

Fortunately, this question is not difficult.

She asked the old woman, "When was the last time the three daughters were together?" ”

"There was a reunion during the Mid-Autumn Festival." The old woman replied.

"How many days have passed since the Mid-Autumn Festival?" Bai Youwei asked again.

The old woman sneered: "The old woman is old, I can't remember ...... clearly."

Bai Youwei frowned slightly.

Not only her, but Shen Mo and Du Lai also frowned.

"What's wrong with you?" Fu Miaoxue didn't know why, "Is this question difficult?" ”

"It's not a difficult question, but something is missing." Bai Youwei explained, "This is a question in the ancient "Sun Tzu Sutra", which asks about a family with three daughters who have been married, the eldest daughter goes back to her parents' house once every five days, the second daughter goes back to her parents' house once every four days, and the younger daughter returns to her parents' house once every three days. After the three daughters left their parents' house on the same day, how many days after the three of them met again??"

"How many days?" Fu Miaoxue blurted out.

Bai Youwei: "Sixty days." ”

The number of days is the least common multiple of the number of days the three daughters are home at intervals.

That is, 3, 4, and 5 are multiplied to get 60.

Fu Miaoxue blinked her eyes and said, "Then tell her the answer." ”

Du Lai held her hand and pulled her behind him, "What is missing is the prerequisite, we don't know when the three daughters left together." ”

"There should be a clue to the Mid-Autumn Festival nearby." Shen Mo said, "Let's look for it separately." ”

As long as you figure out what day the Mid-Autumn Festival in this game is, you can calculate the time when the three daughters will come back together next time.

Fu Miaoxue said: "Oh, what are you doing so trouble~"

After speaking, he jumped in front of the old woman: "Hey, your three daughters will be back tomorrow~" Bai Plating "I haven't become a doll today" The latest chapter of "I haven't become a doll today" is free to read for the first time.