Elementary School Math Problem Solving!!!! High bounty points!!

A line of people is a square team, so there are also 18 people in the column, so the total number of people in the square is: 18 * 18 = 324

The outermost number of people is: 18*4-4=68, because each person in the top corner repeats the count once, so 4 is subtracted

2. It should be that B has done a good deed, and from A's words, we can know that either A has done a good deed, or B has done a good deed, and from B's words, we can know that either B has done a good deed, or C has done a good deed, so that there will be no contradiction in the case that B has done a good deed, for example, if A has done a good deed, then B's two sentences will be true and inconsistent with the title.

Hello, 1. The square matrix is 18 * 18 = 324, and the outer layer is 18 * 2 + 16 * 2 = 68 (horizontal + vertical).

2. If what A says is true, then C has done a good deed, because A is not a true story, so it is not C who does a good deed.

If what B says is true, then A has done a good deed, because B is not telling the truth, so it is not A doing a good deed.

So it is B who does good deeds.

Hope the answer is helpful to you.

outermost layer: 18 + 17 + 17 + 16 = 68 people.

2.I think B did a good thing. We can see it by drawing **

A, B, C.

A said, "No, no."

B said, "No, no."

C said: No.

From the meaning of the title, there is a truth and a lie in the words of each of them, so:

If it is A: then C is not telling a lie and does not fit the topic;

If it is C, then C is not telling the truth and does not fit the topic.

So, it was B who did the good thing.

In the Olympic torch relay event, IAC Hope Primary School lined up in a square of 18 people to greet it, with a total of 324 people in this phalanx? There are 68 people in the outermost layer.

Armor. Second. One of the three classmates did a good deed, and Mr. Wang asked them to investigate who had done a good deed, and they mischievously said the following words:

A said, "I didn't do it, and B didn't do it." B said, "

I didn't do it, and C didn't do it. C said, "I didn't do it, and I don't know who did it."

Each of them spoke a true word and a falsehood, and B did a good deed.

18 = 324 (person).

68 (people) Answer: 324 people Outermost 68 people.

2. The first situation: The first sentence A said was right, A didn't do it, B did it.

Then the second sentence B says is right, B did it, and C didn't.

Then the first thing C said was right, and he didn't do it.

All of them are met, and the other two cases do not need to be considered.

Answer: B did this good deed.

1.Phalanx total: 18x18=324 people.

Outermost layer: 18x4-4=68 people.

2.B did a good deed.

1.This phalanx has a total of 18 * 18 = 324 people.

Outermost layer (18-1) * 4 = 68 people.

2.B did a good deed.

1.324 people and 68 people in the outermost layer.

2.B did a good deed.

18*18 = 324 people Outermost layer 18 + 18 + 16 + 16 = 68 people.

The second question should be made by C, I'm not sure.

18 18 324 people Outermost 4 18 72 people C has done a good deed, and he will be even! Winters are cold.

(954-25 18) 18 25 18 is the number of kilometers the ship sailed in the remaining 18 hours.

954-450) 18 954-450 is the distance that the passenger ship did not travel.

504 18 504 18 is the speed of the passenger ship (distance usage time = speed).

28(km/h)

954÷18－25

28（km）

954 18 The speed of two ships and the subtraction of one ship for the other.