Tony bought 3 lottery tickets and chose identical numbers on each ticket. He finds out that 5 of the numbers on each lottery ticket are winning numbers. If each winning number is worth $20 then how much money, in dollars, has Tony won in total? Give the rationale and then the answer.
Let's think step by step. Across all of the lottery tickets, Tony has a total of 3 lottery tickets * 5 winning numbers per lottery ticket = 15 winning numbers. Across all the numbers, he has won a total of 15 winning numbers * $20 per winning number = $300.. The answer is: 300.

Ted needs to purchase 5 bananas and 10 oranges. If bananas cost $2 each and oranges cost $1.50 each. How much money does Ted need to purchase 5 bananas and 10 oranges? Give the rationale and then the answer.
Let's think step by step. Ted needs 5 bananas and they each cost $2. To purchase the bananas, Ted needs 5 * 2 = 10 dollars. Because Ted needs 10 oranges and they each cost $1.50, Ted needs 10 * 1.5 = 15 dollars to pay for the oranges. All together Ted needs $10 for the bananas and $15 for the oranges, so combined Ted needs 10 + 15 = 25 dollars to purchase all the produce.. The answer is: 25.

Tony has $87. He needs to buy some cheese, which costs $7 a pound and a pound of beef that costs $5 a pound. After buying the beef and his cheese, he has $61 left. How many pounds of cheese did he buy? Give the rationale and then the answer.
Let's think step by step. He spent $26 because 87 - 61 = 26. He spend $21 on cheese because 26 - 5 = 21. He bought 3 pounds of cheese because 21 / 7 = 3.. The answer is: 3.