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Mathematical application problems (self-made problems)
1 A chick finds another chick and asks how many chicks are there?

There are two chickens and a group of ducklings. There are twice as many ducklings as chickens. How many ducks are there?

How many ducklings are there more than two chickens?

Four or three people share six chickens and ducklings equally. How many are there in each?

5 100 people each ate a chicken, and 20 people suffered from bird flu. What is the prevalence rate of these chickens?

Among the people who ate the same batch of chickens, 10 people suffered from bird flu. How many people ate chicken?

7 ?

Eight people catch chickens, all on the same straight line and in the same direction. Chickens run at a constant speed of 3km/h and people chase at a constant speed of 5 km/h. At the beginning, the distance between them is 2 km. How long will it take to catch up with the chicken?