The arrogant appearance of singing while walking really made Wang Chong and the others sweat. Pen | fun | pavilion www. ｂｉｑｕｇｅ。 ｉｎｆｏ

After a while, the childish voice sounded again: "You listen well. The topic I came up with was that there was a man walking on a single-plank bridge. A tiger came in front, and a bear came in the back. How did this person get over? The question is finished, answer it quickly. ”

As you walk and sing, you would have thought that it would be this kind of topic. What to walk on a single-plank bridge. What has a tiger in front and a bear in the back. It's all mess. If someone encounters a tiger and a bear at the same time, how much he must carry it! How to get past! Is that passable?

I thought about it in my heart as I walked and sang, and the more I thought about it, the more confused I became. He couldn't help but say, "Dizzy."

Then I heard the childish voice say, "That's right." It's just fainting. ”

I was stunned while walking, and said happily in my heart: This is considered a pass? It's all about what?

Before he could react. And when they saw the eight stone men, they retreated together. The stone men retreated to their original position, reduced into eight piles of stone and did not move.

Wang Chong and the others were worried that they wouldn't be able to answer the question while singing while walking, but they didn't expect to pass the test in this way, and everyone secretly called it lucky.

Singing while walking is also palpitating. He came to Wang Chong and whispered, "Boss." Shall we move forward? I think it's weird here. ”

Wang Chong looked at him with a wicked smile and said, "You passed the test so easily, what are you afraid of!" I think the owner here is just joking with us. ”

White Hugo also laughed at him and said, "That's it! Can a little ghost head be difficult to stop you? ”

As he walked, he opened his mouth and said nothing. He didn't dare to say that he was right.

The seven continued to walk forward. Beyond this clearing, there is a small mound of earth in front of it, which is shaded by trees on both sides. Seven people could only step on the mound.

As soon as everyone reached the mound, the mound collapsed. Wang Chong and the others were defenseless and fell down together.

Wang Chong's eyes suddenly darkened, and his body fell. He subconsciously grabbed the people around him, and before he could tell who was grabbing, he slipped into a sloping square passage.

Wang Chong and the people in his hands were like sliding slides, sliding all the way down.

I don't know how long it took, maybe it was just a moment. Wang Chong's eyes lit up. When he got used to it, he realized that he was already in a square stone room.

This stone chamber is the size of a basketball court and has a height of 5 meters. Many torches were placed on the walls around the stone chamber to illuminate the stone chamber.

In the middle of the stone chamber is a huge scale. Around the scales is a circle of stone balls. Each stone ball is half a meter in diameter and looks unusually heavy.

Wang Chong looked at his hand. It turned out that he was pulling Niu Lusheng.

Niu Lusheng was still in shock at this time, and he looked around blankly.

Wang Chong pulled Niu Lusheng to look for an exit in the stone chamber, but unfortunately he didn't find it.

While he was searching, Wang Chong saw a circular hole in the wall on one side of the stone room. He found that the hole was about the size of a stone ball on the ground.

Wang Chong tried to pick up the stone ball, but helplessly found that no matter how hard he tried, the stone ball seemed to take root.

Niu Lusheng saw that he was very tired, and hurriedly stepped forward to help. The stone ball was easily picked up by Niu Lusheng, looking at his young age, Wang Chong was really ashamed of himself.

Niu Lusheng held the stone ball and walked towards the circular hole. Suddenly, a childish voice sounded in the stone chamber: "I warn you. If you do this, you will do so at your own risk. ”

Wang Chong immediately stopped Niu Lusheng, and then listened: "There are thirteen more stone balls here." Only one of the stone balls weighed differently from the others. Only this orb is the key to unlocking the trap. That balance can only be used three times. After three times, it was locked. So, you only have three chances to weigh. Let's think about how we can find that unique stone ball. ”

Hearing his words, Wang Chong looked at the scales and then at the stone ball. Only then did he realize that this was the title.

Wang Chong seems to remember that this is a mathematical game called "Three Heng Stars". By weighing three times, individuals with different weights are identified.

Wang Chong thought about it carefully, wrote and drew on the ground, and finally got along with the answer to this question.

There are thirteen stone balls here, and the first thing to do is to put four stone balls at each end of the scale. If the balance is balanced, it means that the weight of the eight stone balls is the same. And that particular stone ball was among the remaining five stone balls.

Then, choose three of the remaining five stone balls and place them on the side of the scale. Take three more stone balls that have been identified as the same weight and place them on the other side of the scale.

If the weight is the same, then the special stone ball is among the remaining two stone balls. Just compare a definite stone ball with one of them to find a special stone ball.

If it is not balanced, it means that there are special stone balls in the three balls. Make a note of whether this side is light or heavy. Finally, choose two of the three stone balls and place them on the scale, if the weight is equal, then the remaining stone ball is a special stone ball.

Another situation is if the eight stone balls are not balanced. Then it means that among these eight stone balls, one is a special stone ball. The remaining five stone balls are all of the same weight.

At this time, it is necessary to make a note of the four stone balls that are lighter and the four stone balls that are heavier, and mark these two groups of stone balls.

After that, take any two of the stone balls of the light group and any three of the reorganized stone balls, and place these five stone balls at one end of the scale. Place the remaining five stone balls, which have been confirmed to be of the same weight, into the other end of the scale.

If one end in question is heavier than the other end, then it proves that this particular stone ball is among the two stone balls of light and heavy. In this way, special stone balls can be identified.

And if the one end in question is lighter than the confirmed end, then it means that the special stone ball is among the lighter three stone balls.

Then, take any two of the three stone balls and compare them, and if there is a difference, then the answer is the lightest stone ball. If it is still the same, it proves that the remaining stone balls of the lighter group are special stone balls.

If, in this test, the scales are still balanced at both ends, the remaining two stone balls in the light group are compared.

When the weight is the same, it proves that the remaining more reconstituted stone balls are special stone balls.

If the weight is different, then the lighter one is the special stone ball. In this way, the problem is solved. (The explanation is clear enough, hehe, it's a bit long.) ）

Wang Chong followed his expected steps and instructed Niu Lusheng to carry the stone ball. Eventually, find the key that unlocks the mechanism.

This twist and turn has made the cattle and deer tired of life. He sat on the ground, panting.

Wang Chong also felt very sorry for Niu Lusheng, but he didn't have the strength to move the stone ball. Wang Chong asked Niu Lusheng to take a good rest, and he walked to the round hole and looked inside.