Ask a sixth grade math problem, use it urgently, and I ll give another 100 points if it s right!!!!

The price of 5 kilograms of lychee is equal to the price of 2 kilograms of longan.

Set lychee a catty x yuan, then longan a catty 5x 2 yuan, by the title has the meaning:

Uncle Wang used Yuan to buy 3 kilograms of lychees and 4 kilograms of longan.

3x+5x/2x4=

3x+10x=

13x=x= 5x/2=

Each kilogram of lychee and each kilogram of longan is 12 yuan.

According to the relationship between longan and lychee**, 4 kg of longan can be replaced with 4 2 5 = 10 kg of lychee, then a total of 3 + 10 = 13 kg of lychee is bought, and the unit price is yuan. Longan unit price: 5 yuan.

Because: the price of 5 kg of lychee is equal to the price of 2 kg of longan, therefore: the price of 10 kg of lychee is equal to the price of 4 kg of longan

The price of 3 kg of lychee and 4 kg of longan is the same as the price of 3 kg of lychee and 10 kg of lychee, that is, the price of 13 kg of lychee, so the price per kilogram of lychee is: yuan) then the price per kilogram of longan is: yuan).

Hello!! Let each kilogram of lychee be x yuan, and each kilogram of longan y yuan 5x=2y; 3x+4y= ；Solve the equation to obtain: x=,y=3 ; Answer: 3 yuan per kilogram of lychee and 3 yuan per kilogram of longan. Good luck with your studies!!

Set x yuan per kilogram of lychee and y yuan per kilogram of longan, and list 3x+4y= according to the problem to solve the equation x=,y=12, then each kilogram of lychee yuan, 12 yuan per kilogram of longan.

Let the ** of lychee be x longan ** for y to get 3x + 4y = and 5x = 3y to solve the equation, I think you should be able to ......

Actually, this question is not a calculation question, but a logic question.

That is, at the beginning, one small person is full, and the second small car is not full.

After adding one person, one small will add one more car, and the second one will just be full, and the second small will add one more car.

Therefore, there can be a small car x for the initial competition.

15x=13（x+1）-1

x=6Total number of people 15*6+2=92 people.

A diagonal line with the diameter of the circle as a square.

Pi*r 2=12

r=(12 pies) (1 2).

d=2rd*((2 (1 2)) 2) 2=s(area of square row).

Count it out! It's the length of the diagonal of the square! Just find the side length of the square! Count it yourself, brother! I'm not going to give it to you....

The radius of the circle r= (12

The side length of the square = 2r 2 = 2 (6

The area is 4*6 square centimeters.

Children? Twelve centimeters? It can't be counted.

2. If the five-digit number 923 (4) (0) is divisible by 60, the five-digit number may be (92340).

3. The four-digit number 3a71 is divisible by 9, then a=(7), and the four-digit number 3aa1 is divisible by 9, then a=(7).

There are (8) divisors and (innumerable) multiples.

5. A three-digit number is a multiple of 9, and between 300-400, the sum of its hundred digits and single digits is 10, then the three-digit number is (387).

6. There is a hundred-digit number, and the number on each digit is 2, and the remainder of this hundred-digit number divided by 9 is (2).

7. The five-digit number 2a89b is divisible by 36, and such a five-digit number has (26892 and 22896).

8. The six-digit number 1803 ( ) 6 is divisible by 12, where the ten digit is (3 or 9).

9. The three numbers are 123,345,567, find the fourth three-digit number to make it as large as possible, and the average of the first three numbers is an integer, and this three-digit number is (997).

10. From 1 to 1000, among the 1000 natural numbers, 1 2 3 4 ....991 100 with (222) consecutive zeros at the end.

11. There are 767 pieces of fruit candy, and the average distribution is just over to a group of children, only to know that the number of pieces of fruit candy shared by each person is less than the number of children, and there are (59) people in this group of children.

12. A two-digit number is divided by 1, and this two-digit number is (61).

13. A box of pencils can be divided equally among a child, and there are at least 30 people in this box of pencils.

14. A basket of pears should be divided into 1 more than 2 pears per portion, 3 more than 2 pears per portion, 5 more pears per portion, and at least 29 pears in the basket.

pens, 57 counters, average prizes.

Outstanding students in grades 4 and 5. There is a maximum of (19) students.

1. Can, 0, 77, Unlimited, 2

Summary: If a number is to be divisible by 3, then the sum of the digits on each digit of the number must be a multiple of 3.

For a number to be divisible by 9, the sum of the digits on each digit of the number must be a multiple of 9.

For a number to be divisible by 5, the single digit of the number must be 0 or 5

For a number to be divisible by 6, the sum of the digits on each number must be a multiple of 3, and the single digit must be even.

For a number to be divisible by 4, the last two digits of the number must be divisible by 4.

If you are finding a divisor, find all the factors first, and then choose two factors, three factors, and four factors. All numbers that are combined to be less than that number are called approximate numbers.

1 Question Yes 0

2 questions 15390

3 Question 7 7

4 questions 3 Infinite.

5 questions 387

6 questions 87 more column 22896

8 questions 180336

9 questions 993

10 questions 1100

Question 11 59

12 questions 121

Question 13 30

Question 14 29

Question 15 95

1. Yes (sorry, this will not be 10, (it seems to be 10, but I'm not sure 15, (I don't understand the question).

1) Can 0

4) 5 Countless ones.

6) 200 0s

8) 180336 The ten digits are 3

Your homework, right? Do your own homework!

1. Can 20040

or 92360

Multiple?? or 22896

Or 910, is there a problem with the question 991*100? Or 99*100?