Step-by-step reasoning process: 30 hours is 30 / 5 = 6 times more time. So the spider would be able to catch 6 * 9 = 54 flies.
The question and answer:
Question and answer: During 5 hours, a spider can catch 9 flies. How many flies would this spider catch in 30 hours if he would keep his efficiency?
The answer is 54

Step-by-step reasoning process: Aang, Sokka and Toph caught 7 fish + 5 fish + 12 fish = 24 fish. The average catch of fish per person is 24 fish / 3 people = 8 fish per person.
The question and answer:
Question and answer: If Aang caught 7 fish, then Sokka caught 5 fish, and then Toph caught 12 fish, what is the average amount of fish that each person caught?
The answer is 8

Step-by-step reasoning process: The total planned cost for the party was 100 * 50 = $5000. The total expenses for the party are 5000 - 500 = $4500.
The question and answer:
Question and answer:
Hally and her friends organized a high school reunion. To cover the cost of a late-night party that they planned for at the reunion, each attendee had to pay $100. After the party, Hally and her friends realized that the total expenses were $500 less than the total contributions. If there were 50 people at the party, how much money was used to pay for the party expenses?
The answer is 4500