For 4 adult patients per hour, Dr. Lindsay receives 4 * 50 = 200 dollars per hour. For the 3 child patients per hour, Dr. Lindsay receives 3 * 25 = 75 dollars per hour. Thus, Dr. Lindsay receives 200 + 75 = 275 dollars per hour. In an 8 - hour day, Dr. Lindsay receives 8 * 275 = 2200 dollars.
The answer: 2200
Reverse engineering the question: When Doctor Lindsay works in her office, she usually sees 4 adult patients and 3 child patients every hour. If the cost for an adult's office visit is $50, and the cost for a child's office visit is $25, how much money, in dollars, does Doctor Lyndsay receive in a typical 8-hour day for seeing all her patients?


Reasoning and answer: Terry's weekly income is $24 x 7 = $168. Jordan's weekly income is $30 x 7 = $210. So, the difference between their weekly income is $210 - $168 = $42.
The answer: 42
What was the question?
Question: Terry's daily income is $24, while Jordan's daily income is $30. Working 7 days a week, how much is the difference between their weekly incomes?


Mr. Grey had a $100 000 x 10 / 100 = $10,000 profit. So, Mr. Grey sold the house to Mr. Brown for $100 000 + $10 000 = $110,000. Mr. Brown sold the house $110 000 x 10 / 100 = $11,000 less than its purchased price. Thus, Mr. Brown sold it for $110 000 - $11 000 = $99,000 to his friend.
The answer: 99000
Reverse engineering the question: Mr. Grey's house was worth $100,000. He sold the house to Mr. Brown at a profit of 10%. After one year, Mr. Brown sold the house to his other friend with a 10% loss. How much was Mr. Brown's selling price?


Reasoning and answer: If Alex has 4 pens in the first week of a month, she will have 4 * 2 = 8 pens in the second week. After her pen collection doubles in the third week, Alex will have 2 * 8 = 16 pens. In the last week of the month, Alex will have 2 * 16 = 32 pens after her pen collection. If Jane has 16 pens after a month, Alex will have 32 - 16 = 16 more pens than Jane.
The answer: 16
What was the question?
Question: Alex has 4 pens in the first week of a month. Every week her pen collection doubles. How many more pens will Alex have than Jane if Jane will have 16 pens after a month?


Fred's barn started with 100 + 29 + 9 = 138 animals. Brian bought half of these, so there were 138 / 2 = 69 remaining. After Jeremy gifted Fred 37 goats, there were 69 + 37 = 106 animals in the barn. So, 106 / 2 = 53 of these animals are male.
The answer: 53
Reverse engineering the question: In Fred the Farmer's barn, there were 100 horses, 29 sheep, and 9 chickens. Brian bought half of the animals and sold them at the market. Jeremy then gifted Fred an additional 37 goats. If exactly half of the animals in the barn are male animals, how many male animals are there in the barn?


To finish an audiobook 30 hours long, listening to 2 hours of each audiobook a day, Fernanda took 30 hours / 2 hours / day = 15 days to finish one audiobook. If she purchased 6 audiobooks, the total number of days she will take to finish all the audiobooks is 6 audiobooks * 15 days / audiobook = 90 days.
The answer: 90
Reverse engineering the question:
Fernanda purchased six audiobooks from Audible to listen to from her audible app. If each audiobook was 30 hours long and she listened to 2 hours of an audiobook each day, calculate the total time it took her to finish the six audiobooks?