Question: Nicole has 4 fish tanks. The first two tanks need 8 gallons of water each and the other two need 2 fewer gallons of water each than the first two tanks. If Nicole needs to change the water of the aquarium every week, how many gallons of water will she need in four weeks?
Answer: Step-by-step reasoning process: The first two tanks need 8 x 2 = 16 gallons of water. The other two tanks need 8 - 2 = 6 gallons of water each. So, the two other tanks need 6 x 2 = 12 gallons of water. Nicole needs 16 + 12 = 28 gallons of water every week for her four tanks. Therefore, she needs a total of 28 x 4 = 112 gallons of water in four weeks.
So the answer is 112.

Question: Tony has two fish. Every year, his parents buy him two more, but one of them dies. How many fish will he have in five years?
Answer: Step-by-step reasoning process: Each year Tony has one more fish than before because 2 - 1 = 1. In five years, he will have 5 more fish because 5 x 1 = 5. In five years he will have 7 fish because 2 + 5 = 7.
So the answer is 7.

Question: A candy store sold 20 pounds of fudge for $2.50/pound, 5 dozen chocolate truffles for $1.50 each and 3 dozen chocolate-covered pretzels at $2.00 each. How much money did the candy store make?
Answer: Step-by-step reasoning process: 20 pounds of fudge at $2.50 / pounds is 20 * 2.50 = $50.00. The 5 dozen truffles were sold in individual units so a dozen is equal to 12 so 5 * 12 = 60. 60 chocolate truffles, at $1.50 each sold for 60 * 1.50 = $90.00. The 3 dozen chocolate pretzels sold in individual units so a dozen is equal to 12 so 3 * 12 = 36. 36 chocolate pretzels sold for $2.00 each sold for 36 * 2 = $72.00. All total, the store made 50 + 90 + 72 = $212.00 from candy sales.
So the answer is 212.

Question: Tracy has a charity book collection store from which she receives book donations from members of her town. Any person who wants to borrow a book is free to do so as long as they return the book after they've finished reading. She has already received 300 book donations. If ten people come and donate five books each in a week, and a total of 140 books are borrowed by other people to read, calculate the total number of books she has remaining in the store?
Answer:
Step-by-step reasoning process: The ten people donated 10 * 5 = 50 books. The total number of books in her store after the new donations is 300 + 50 = 350 books. When some of the books are borrowed, her total collection becomes 350 - 140 = 210 books.
So the answer is 210.