Reasoning and answer: Leah spent 28 / 7 = $4 on a milkshake. She had 28 - 4 = $24 left. She put half in her savings account and half in her wallet, so she had 24 / 2 = $12 in her wallet. Her dog shredded all the money in her wallet but $1, so Leah lost 12 - 1 = $11.
The answer: 11
What was the question?
Question: Leah earned $28 working odd jobs around the neighborhood. She spent a seventh of it on a milkshake and put half of the rest in her savings account. She left the remaining money in her wallet. Her dog got ahold of her wallet and shredded all the money inside but $1. How many dollars did Leah lose?


The Biology class has 200 / 2 = 100 students. The boys in the Biology class are 1 / 4 * 100 = 25 students.
The answer: 25
Reverse engineering the question: There are three times as many girls as boys in the Biology class. The Physics class has 200 students. If the Biology class has half as many students as the Physics class, how many boys are in the Biology class?


Reasoning and answer: Winwin paid $50 x 20 / 100 = $10 for the tax. So, she has $50 - $10 = 40 after paying the tax. Therefore, Winwin was able to take home $40 - $5 = $35 after she paid for the processing fee.
The answer: 35
What was the question?
Question: Winwin won $50 in a lottery. She paid 20% for the tax and she paid $5 for the processing fee. How much was she able to take home?


The difference in cubic yards between the two cities is 9000 - 6400 = 2600 cubic yards. Since the number of people living in a city per cubic yard is 80, there are 80 * 2600 = 208000 more people living in a city with 9000 cubic yards than a city with 6400 cubic yards.
The answer: 208000
Reverse engineering the question: In a city, the number of people living per cubic yard is 80. How many more people are in a city with 9000 cubic yards than a city with 6400 cubic yards?


Reasoning and answer: Roberto skips 70 times per minute because 4,200 / 60 = 70. Together they skip 150 times a minute. They will skip 2,250 times because 150 x 15 = 2,250.
The answer: 2250
What was the question?
Question: Roberto and Valerie are jumping rope at recess. Roberto can skip 4,200 times an hour. Valerie can skip 80 times a minute. If they jump rope for fifteen minutes straight, how many skips will they total?


Reasoning and answer: First find the number of cars in Section G by multiplying the number of rows by the number of cars per row: 15 rows * 10 cars / row = 150 cars. Then do the same thing for Section H: 20 rows * 9 cars / row = 180 cars. Then add the two quantities of cars to find the total number of cars Nate walked past: 150 cars + 180 cars = 330 cars. Finally, divide the number of cars Nate passed by the numbers he passes each minute to find how long he spent searching: 330 cars / 11 cars / minute = 30 minutes.
The answer: 30
What was the question?
Question:
Nate got lost looking for his car in the airport parking lot. He had to walk through every row in Section G and Section H to find it. Section G has 15 rows that each hold 10 cars. Section H has 20 rows that each hold 9 cars. If Nate can walk past 11 cars per minute, how many minutes did he spend searching the parking lot?