Zhang Feng, who temporarily gave up letting the crown confess his lord, began to look for a way to get out of here. Because he didn't find an exit when he looked into the room just now.

Because there was a magic array arranged on the surrounding walls, showing the starry sky, it was impossible to find the exit with his eyes, so Zhang Feng groped on the wall inch by inch with his hands. After more than half an hour of fumbling, he had to give up on this somewhat stupid idea, because he had not found an exit at all.

When this method was abandoned, his eyes fell on the most conspicuous object in the room, the bust of Ravenclaw.

He used identification on the bust.

Name: Bust of Ravenclaw

Description: Made by Rowena Ravenclaw during his lifetime to place his own crown, with mystical magic.

Application: You guess ......

Seeing this method of use, Zhang Feng felt his qi and blood surge, and with a breath of turbid air, he rushed his eyeballs and rolled out with a white eye.

Zhang Feng circled around the bust three times, and used all the magic he knew on the bust, but all the magic was like a mud cow entering the sea, and the bust did not react at all.

He had no choice but to abandon his wand, place his hand on the bust, and input his magic into the bust.

The bust suddenly seemed to come to life.

"Well~~~, since the last time a Muggle kid named Albert Einstein was there, someone finally woke me up again. But last time, the Muggle kid used electricity to make me a little uncomfortable, but it still felt more comfortable with magic. What is your name, child?" The voice of the bust was very good, the same as the voice that had just lingered in Zhang Feng's ears, but there was no temptation in the voice.

"My name is Wind Chang, and I'm a student at Hogwarts Ravenclaw. Zhang Feng felt that this bust should know about Hogwarts, so he said it directly.

"Oh, it's been 1,000 years since I left the school, but the crown in your hand often tells me about the school, so I know what's going on. Your current headmaster's name is Dumbledore, right? He used to be a student of Gryffindor. The bust heard a sigh of emotion at Hogwarts.

"Yes, that's right, but I want to go out now, do you know how to get out?"

"Yes, if you want to leave this room, you need to get the crown's approval. The bust replied.

"However, it didn't communicate with me, and I didn't know how to get its approval. Zhang Feng asked for advice from the bust.

"You wear this crown and then inject mana into the jewel of the crown so that it can communicate with you. "I thought I was going to put on the crown and then enter the magic power!

Zhang Feng followed the method of the bust and entered the magic power into the crown.

"Well~~~, extraordinary wisdom is the greatest wealth of mankind! You want to go out, and you want to be recognized by me, very ambitious ideas! As long as you can answer the three questions I mentioned below, your wish can be realized. The voice of the crown sounded in Zhang Feng's mind.

"Are you ready?"

"That's it!"

"Question 1: Suppose there is a pond with an infinite amount of water in it. There are 2 empty kettles with a capacity of 5 litres and 6 litres. How to get 3 liters of water from the pond with only these 2 kettles. "This question is not too difficult for Zhang Feng.

"First fill the 5 litres and pour them into the 6 litres, so that there are 5 litres of water in the 6 litre jug, then fill the 5 litres and fill the 6 litres with the 5 litre jug, so that there are 4 litres of water left in the 5 litre jug, pour the 6 litres of water out and pour the remaining water from the 5 litre pot into the 6 litre jug, so that there are 4 litres of water in the 6 litre jug, and finally fill the 5 litre jug and pour it into the 6 litre jug, 5-2 = 3. Zhang Feng answered the first question correctly.

"Question 2: Three young men fall in love with a girl at the same time, and in order to decide which of them can marry this girl, they decide to have a duel with a pistol. John's shooting percentage is 30 percent, Johnny is better than him, shooting 50 percent, and the best gunslinger is Jack, who never misses and is 100 percent shooting. Because of this obvious fact, for the sake of fairness, they decided to go in this order: John shot first, Johnny second, and Jack last. And so on until they are left with only one person. So who of the three has the best chance of surviving?"

"Johnny. Because John was the first to strike, the first person he had to deal with would be Jack, so that he would be kept safe, because if Johnny was dealt with, he would naturally be Jack's target, and he would definitely be killed. And Johnny would have died if he hadn't shot Jack with the first shot and had gone to fight John (he would have hit high enough to be targeted by Jack, the sharpshooter who came next). He must have tried to kill Jack first. Then the 30% and 50% chance is 80% (Jack's mortality in the first round, but there will be a slight deviation, after all, it is added). Then Johnny's mortality rate in the first round is a little over 20% (Jack's hit minus his own mortality). Assuming that Jack dies in the first round and it is John's turn to hit Johnny, then John's hit becomes a little over 50% (his own hit plus Johnny's death). This became a Johnny showdown, where John's first shot in the second round was 50%, and so was Johnny. But if it drags on, it will naturally be Johnny who will have the upper hand, and it will naturally be Johnny who may win. ”

"There is a diamond in the elevator door on each floor from the first floor to the tenth floor, and the diamond is of different sizes. You take the elevator from the first floor to the tenth floor, and the elevator doors will open once on each floor, and you can only take the diamond once, and ask how can you get the biggest one?"

"Take the diamond on the first floor, then compare the diamond in your hand with the diamond on the first floor on each floor, and if the diamond on the first floor is bigger than the diamond in your hand, then replace the diamond in your hand with the diamond on that floor. ”

"You've got my approval, get ready, we're going to get out of here together. After Zhang Feng answered, the voice of the crown came to his mind.