5 minutes 5 cats can catch 5 rats in 5 minutes.
So
1 cat can catch 1 rat in 5 minutes. So, 30 cats can catch 30 rats in 5 minutes only
A fisherman catches thirty fish in a five-day fishing competition. Each day he catches three more than the last.
How many fish did he catch on the first day?
In a single week, each cat in the rat infested village of Catattackya killed the same number of rats as every other cat. The total number of rat fatalities during the week come to 299. Less than 20 cats achieved this remarkable feat. How many cats were there in Catattackya and how many rats did each kill?