A fourth grade math Olympiad problem to solve

The additional eight people paid 8*24=192 yuan for the people in front, that is, the people in front saved a total of 192 yuan. And because the people in front of them saved 30-24 = 6 yuan per person, there were a total of 192 6 = 32 people in front of them (each person saved 6 yuan, a total of 192 yuan saved). The total fare is 30*32=960 yuan.

The total formula is: [8*24 (30-24)]*30=960 yuan.

8 * 24 = 192 yuan is the money that the person who got on the bus before is less, and one person is less than 30-24 = 6 yuan.

There were 192 people who got on the bus before 6 = 32 people.

The total fare is 32x30=960 yuan.

Suppose there were x people, and the original fare needed to pay was 30x and later 24 (8+x) they were equal. 30x=24(x+8) etc. x=32 There were 32 people. The total cost is 32x30=960

Let it be said that there are x people, according to the meaning of the title:

30x=24x+8*24

x=32 then the rental fee is 30*32=960

The solution starts with x personal car rentals, according to the topic.

30x=（x+8）*24

Solution: x=32

Total car rental fee = 32 * 30 = 960 yuan.

Assuming that the original number of people is x, then 30*x=24*(x+8).

x=32, so fare = 24*30=960 yuan.

Let's take x minutes to get to school 100 + 50x + 50 8 = 100 + 60x - 60 5 x = 70 minutes So the distance = 4000 meters.

Let the distance be x and the total time be y

50(y+8)=x

100+60(y-2-5)=x

x=4000 y=72

It is easy to make mistakes and omissions in listing one by one, so take the method of calculation:

When the number of tens is 0, it is not possible because the single digit is less than ten digits.

When the number of tens is 1, the single digit can only be 0, and the hundred digit can be any one from 2 to 9, with a total of 1*8=8.

When the number of tens is 2, the single digit may be any of the middle, and the hundred digit can be any of 3-9, for a total of 2*7=14.

When the number of tens is 3, the single digit may be any one from 0 to 2, and the hundred digit can be any one from 4 to 9, with a total of 3 * 6 = 18.

When the number of tens is 4, the single digit may be any one from 0 to 3, and the hundred digit can be any from 5 to 9, with a total of 4 * 5 = 20.

When the number of tens is 5, the single digit may be any one from 0 to 4, and the hundred digit can be any one from 6 to 9, with a total of 5 * 4 = 20.

When the number of tens is 6, the single digit may be any one from 0 to 5, and the hundred digit can be any one from 7 to 9, with a total of 6 * 3 = 18.

When the number of tens is 7, the single digit may be any one from 0 to 6, and the hundred digit can be any one from 8 to 9, with a total of 7 * 2 = 14.

When the number of tens is 8, the single digit may be any one from 0 to 7, and the hundred digit can only be 9, with a total of 8*1=8.

When the number of tens is 9, it is not possible because the hundred digits are greater than the tens.

So there are a total of (8 + 14 + 18 + 20) * 2 = 120 three-digit numbers.

abc a>b>c

The sequential pattern can be written all the way up to 987

At least 94 points, 6 people deducted a total of 54 points, minus the lowest score, 35 points, and 19 points, and the two of them took the test at most, 100 points, then 19 points, and the last three points.

A minimum score of 94 can be taken. (all integer points).

It can be assumed. The first and second places have a maximum score of 100 points, and the sixth place has a minimum score of 65 points, and the remaining average score can ensure that the third place is the lowest.

6*91=546

Because it's the least to take.

Therefore, the first and second place is 100 points.

then 546-265=281

And because the score of the third place is greater than the first.

So 281 3

So the score for third place is not lower.

So for 94

The third place must be at least 94 points To take the third place at least, the rest of the people must have the highest score, up to 100 The second place is 99 points, and 6 people have a total of 54 points deducted 54-1-35=18 The other three people have an average deduction of 18 4 = 6 100-6 = 94 points.

6*91=546

Therefore, the score of the third place is not less than 94

According to the children who are studying Olympiad mathematics, this is the answer given by the teacher.

Answer: There is no solution. Because straight lines do not distinguish between thickness and thickness.

The question should be less than one ...... of the sum of the fifth and sixth grades

Let the total number of grades 3 and 4 x, grade 5 be y, and grade 6 be z, according to the meaning x + 4 + x + y = 24

x + 4 + x + z = 28

2x + y = 20

2x + z = 24

z = y +4

x+4/ x / y / z

There are many answers to this question, such as: 6th grade, 12th grade, 5th grade, 8th grade, 1st grade, and 2nd grade, 10

Year 3 & 4 6 And many more.

The total number of exhibited works in the first and second grades is 10, the total number of works in the third and fourth grades is 6, the total number of works in the fifth grade is 8, and the total number of works in the sixth grade is 12.

<>This line is very thick!!

The sum of the inner angles of the n-sided shape = 180° (n-2), so the sum of the inner angles of this pentagon is 540, but the sum of the inner angles of the two triangles is 360, so this is not true at all. I hope it can help you.,My picture is not good-looking.,Roughly like this.。。 Don't laugh at me.

There is no thickness of the line, so draw the straight line as a triangle.

The average height of boys is 137cm, and the total average height is 138cm, and there are 500 boys, indicating that there is a lack of 500cm. The average height of girls is 140cm, so the average height of girls is used to make up for the average height of boys, and the average height of girls is 2cm more, so as long as there are 250 girls, you can make up for the 500cm missing by boys.