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A complete collection of answers to the thesis assignments on the Collapsed Star Dome Railway:
One of the problems faced by the Ministry of Education
The Remstein family has a large parking lot with 42 cars parked in it. One day a thief stole the wheels from several of the cars. Now, some of the 42 vehicles have only three wheels left. When the insurance company's employees came to assess the damage, they bent down and counted the number of wheels in the parking lot and found that there were 154 wheels in the parking lot. Excuse me, how many cars have their wheels stolen?
1. 42 vehicles
2. 14 vehicles
3. 28 vehicles
Answer: 14 cars
Problem-solving ideas
In fact, this question is very simple. How many wheels are lost means how many cars have been stolen. 42 times 4-154 = 14.
Problem Two for the Ministry of Education
58 is the first eight falls of snow, and eight falls of first snow is 0.
39 is the summer-covering bamboo, and the summer-covering bamboo is 14.
99 is the ball peony, and the ball peony is 8.
27 is the sun flower, and the sun flower is 4.
Excuse me, what do Chuxuebaluo, summer-covering bamboo, ball peony, and sunflower add up to?
1.142
2.62
3,365
Answer: 162
Problem-solving ideas
58 is 5*8=40 (the first snow and eight falls = 40), so (the first snow and eight falls) 4*0=0 is 0
39 is 3*9=27 (Summer Bamboo=27), so (Summer Bamboo)2*7=14 is 14
99 is 9*9=81 (ball peony=81), so (ball peony) 8*1=8 is 8
27 is 2*7=14 (sunflower=14), so (sunflower) 1*4=4 is 4.
So the answer is 162, so the answers given above are all wrong, and the correct option is 162 in the subsequent answers.
The third problem for the Ministry of Education
1. Jack said Chris was a criminal who stole the wheel.
2. The prisoner did not lie
Topic: Who among Jack, Chris, and Eric stole the wheel.
Answer: Eric
Problem-solving ideas
If Jack is the prisoner, then what he said is correct, but he said that Chris is the prisoner and there is only one prisoner, so the logic is illogical and excludes Jack as the prisoner.
If Chris is a prisoner, then what Jack said is correct, and the prisoner is right. Jack is not a prisoner, and what he said is definitely wrong, so Chris is ruled out as a prisoner. The answer is obvious, Eric is the prisoner.
Dilemma No. 4 for the Ministry of Education
Among the three, Howard, Philip and Joyce. There is a good person. A bad guy and a liar. Good people only tell the truth, bad people only tell lies. As for liars... they dare to tell any nonsense and tell the truth for a while. Then he lied again.
One day Joyce said: Phil was either a good guy or a bad guy.
Then Philip said: There is a good man among Howard and Nong Yiduan.
Excuse me, who among the three is the liar?
1.Howard
2. Philip
3.Joyce
Problem-solving ideas
1. We only look at what Philip said. Assuming that what Philip told is a lie, then neither Howard nor Joyce is a good person. Then it can be inferred that Philip is a good person, which means that Philip is telling the truth (good people tell the truth). This is consistent with Assume a contradiction, therefore, Philip is telling the truth;
2. It means that Philip is either a good person or a liar. Since Philip is telling the truth, it means that one of Howard and Joyce is indeed a good person. Then this means that Philip is not a good person, so Philip can only be a liar. ;
3. If we further reason here, we can conclude that what Joyce told lies means that Joyce is a bad person, and then Howard is a good person;
4. That is, Howard is a good guy, Joyce is a bad guy, and Philip is a liar.
Problem 5 for the Ministry of Education
1453=0
1915=1
2409=2
6010=3
9981=4
8848=?
1, 4
2, 5
3, 6
4.18000
Problem-solving ideas
There are no numbers with circles in 1453, so 1453=0
There are only 9 circles in 1915, so 1915=1
The two numbers 0 and 9 in 2409 have circles, so 2409=2
By analogy, 8 has two circles, and 8848 has three 8s, so 8848=6
The sixth problem for the Ministry of Education
The little girl Hook is playing the "guess the suit" game with her friends.
She found Julian, Luca and the eldest sister who always played with them, and put a paper flower on each of their heads. There are four paper flowers in total, two are white and two are purple. No one, including Hook, peeked at the colors of the paper flowers on their own heads and those of others.
Then she asked everyone to stand forward in a row. Starting from the beginning are Hook, Julian, Luca and Big Sister. Everyone can only face forward and look at the person in front of them, but they are not allowed to look back or peek at the paper flowers on their heads.
To be fair, Hook also blindfolded his eldest sister because she was too tall!
However, although they couldn't see it, we saw it at a glance when we passed by: Hook and Luca had white flowers on their heads, while Julian and the eldest sister had purple flowers on their heads. Although Hook strives for fairness, only one person in this game is destined to guess the color of the paper flower on his head. Who is that person?
1. Hook
2. Julian
3. Luca
4. Big sister
Answer: Julian
Problem-solving ideas
First consider in a row: Hook<& Julian<& Luca<& Big Sister
1. Hook and Big Sister must not know their own colors. One cannot see them, and there is no one in front of them. They cannot get any clues.
2. Luca saw a white and purple color, and he couldn't deduce it.
3. So Julian found that Luca couldn't infer, which meant that the colors in Luca's eyes were different. Julian could use this to deduce that his color was different from the previous one. Hook was white and Julian was purple.
The Seventh Problem of the Ministry of Education
It is said that there are ancient treasures hidden in an inconspicuous corner of the snowfield. The handsome dark blue guy Sambo went through all kinds of hardships and found the mysterious treasure location. There were two talking doors, one golden door and one silver door.
Among these two doors, one door can only tell the truth, while the other door can only tell lies: behind one door is treasure, and behind the other door is an ancient monster. According to the treasure map, Records indicate that two doors will only answer one question.
The witty Sambo dark blue handsome guy thought for a moment and asked Yinmen: [What would Jinmen say about what is behind you?
Silver Gate replied: [It will say that behind me is treasure. ]
Which door should Sambo's dark blue handsome guy open?
1. Open the golden door 2. Open the silver door
Answer: 1. Open the Golden Gate.
Problem-solving ideas
We can discuss them in categories. If gold is fake and silver is real, then what the silver gate says about the golden gate must be reversed, that is, behind the silver gate is actually a monster, and behind the golden gate is the treasure chest;
If the gold is real and the silver is fake, it means that what the Silver Gate said must be reversed, that is, the Golden Gate will actually say that there is a monster behind the Silver Gate, so the answer is Golden Gate.
The Eighth Problem of the Ministry of Education
Belloberg Institute has discovered an algae that is very harmful to the ecosystem. It can double in size every day and can fill a reservoir with algae in just thirty days, contaminating precious water sources. How many days will it take for this algae to occupy half of the reservoir?
1.15 days
2. 29 days
3. 31 days
Problem-solving ideas
It is known that this kind of algae can double every day, so if you want to completely occupy the pool on the 30th day, it must occupy half of it on the 29th day.
Summary of answers:
One: 14 vehicles
Part 2: 162
Third: Eric
Four: Philip
5:6
Sixth: Julian
Part 7: Open the Golden Gate
Eight: 29 days
The above is all about the list of answers to the essay task of Collapsed Star Dome Railway. I hope it will be helpful to everyone!