I hope to talk about the solution There are 100g sugar in No.1 cup, water in No.2 cup and 100g salt in No.3 cup. First, half of the liquid in No.1 cup and 1 / 4 of the liquid in No.3 cup are poured into No.2 cup, then they are stirred well, and then 2 / 7 of the liquid in No.2 cup is poured into No.1 cup, Then pour out 1 / 7 to 3 cups of the remaining liquid. Q: what is the ratio of salt content to sugar content in each cup

I hope to talk about the solution There are 100g sugar in No.1 cup, water in No.2 cup and 100g salt in No.3 cup. First, half of the liquid in No.1 cup and 1 / 4 of the liquid in No.3 cup are poured into No.2 cup, then they are stirred well, and then 2 / 7 of the liquid in No.2 cup is poured into No.1 cup, Then pour out 1 / 7 to 3 cups of the remaining liquid. Q: what is the ratio of salt content to sugar content in each cup

In the second cup, there is sugar 100 × (1 / 2) × (1-2 / 7) × (1-1 / 7) = (g) and salt 100 × (1 / 4) × (1-2 / 7) × (1-1 / 7) = (g) because the upper and lower parts can be offset by the same ratio, the ratio of salt content to sugar content in the second cup is] 100 × (1 / 2)]: [100 × (1 / 4)] = 1:

This is a math problem, Professor Li and Professor Wang (I hope someone can help me solve the problem. I must have a way to solve the problem.)
Professor Li and Professor Wang cooperate to develop a new product. They each borrow a reference from the library. The following is the design of their literature review:
Scheme 1: Professor Li and Professor Wang can read 200 pages and 250 pages each day
Plan 2: Professor Wang consulted the literature one day later than Professor Li, and Professor Li still consulted 200 pages a day, while Professor Wang only consulted 300 pages a day
Can you work out how many pages each of the literature they consulted based on the above information?

It is estimated that you want to solve the problem without equation. Comparing scheme 1 and scheme 2, we can see that the total number of days used in the two schemes is the same. Professor Wang used to look up 300-250 = 50 pages more every day than before. That is to say, the 250 pages he originally looked up on the first day were divided into 50 pages every day, so the time he used to look up 50 pages later is 250

Cattle grazing problem: the grass in a pasture grows evenly every day. This piece of grass can feed 20 cattle for 5 weeks, or 18 cattle for 6 weeks. How many weeks can it feed 11 cattle?

Set "1" for cattle to eat grass every day
20×5×1=100
18×6×1=108
Because 18 cattle ate for 6 weeks, while 20 cattle only ate for 5 weeks, it is concluded that the grass per week is 108-100 = 8. Therefore, the grass per week can be fed by 8 cattle. The original grass in the pasture is (20-8) × 5 or (18-8) × 6 = 60. That is to say, if the pasture does not grow grass, 60 cattle can eat for a week. Now there are 11 cattle, which is 60 △ 11-8 = 20 weeks
A: it can feed 11 cows for 20 weeks