Let's have a mental question at noon. Let's take a look at everyone's level. The answer will be published in two days.

01. Question difficulty: simple
A hunter came home with a sheep, a wolf and a cabbage and met a river on the road. There is only one boat by the river, but the boat is too small. At a time, it can only carry hunters and other things across the river. But when a hunter is absent, the wolf eats sheep and the goat eats cabbage. How can we safely transport wolves, sheep, and cabbage across the river?

02. Question difficulty: Moderate
There are 10 sugar in the teacher's box, and there are 10 students.
The teacher said: each of you will have a sugar and one left in the box. How can this problem be solved?

03. Question difficulty: difficult
Xiao Ming and Xiao Hua bought 10 Jin of honey and packed it in a large bottle. to divide the honey equally, there are only two empty bottles, one containing exactly 7 kg, and the other containing exactly 3 kg. how can we split honey in the simplest way.

04. Question difficulty: simple
A hunter saw a Huang Ying in the forest. He wanted
Huang Ying told the hunter that there were five flowers behind the big tree, four of which were real flowers and I changed. Can you find me?
Then Huang Ying becomes a flower.
Can you find it?

05. Question difficulty: Moderate
There are 100 balls, one of which is of low quality,
There is only one balance now. You should try to find the ball a few times.

06. Question difficulty: difficult.
I don't know how deep a well is. I don't know how long a rope is.
Fold the rope to 3 fold and drop the bottom hole at one end. When the bottom of the rope reaches the bottom hole, the top is 1 foot lower than the wellhead.
If you fold the rope to 2 folds, the upper end is 6 feet higher when the lower end reaches the lower end of the well.
Do you know how deep the well is and how long the rope is?

07. Question difficulty: simple
Three hunters crossed the river with a black bear and two brown bears.
The ship is very small. Only two people or two bears can be carried at a time, or one person or one bear can cross the river.
All three hunters will go boating. The black bear is trained by hunters and also goes boating.
But once the number of bears exceeds the number of people, the bears will eat people.
How to safely cross the river

08. Question difficulty: Moderate
Xiao Ming, Xiao Hua, and Xiao hongsan fish.
After the fishing, someone asked them if they had caught many fish today.
James said a total of 22 articles.
I have two more fish and three more fish than I have.
Do you know how many hops each of them has?

09. Question difficulty: difficult
There are four ships. The time required for the four ships to cross-region varies. The first ship takes 1 minute, the second ship takes 2 minutes, and the third ship takes 5 minutes, ship 4 takes 10 minutes.
How can we use the fastest time to route four ships to the opposite side?
[There is only one person rowing a boat. You can drag up to two ships at a time, but you must drag them back.]

10. Question difficulty: difficult
There are 10 cases of canned food. These 10 cases of canned food are 20 cases per case, each containing 1 kg.
But there is a box, each box only has 9 two.
Now there is only one scale, and only one scale is allowed.
, We need to find out the box with problems.
[Premise: You can't say you need to use your hands to raise your hand.]