The labor cost 16 * $75 = $1200. So the total cost was $1200 + $1200 = $2400.
The answer: 2400
Reverse engineering the question: John's car needs a new engine. The labor costs $75 an hour for 16 hours. The part itself cost $1200. How much did the repairs cost in total?


Reasoning and answer: The difference in age between Joel and his dad is 32 - 5 = 27 years. When you double this gap in years, you have 27 x 2 = 54. When his dad is 54, Joel will be 54 / 2 = 27 years old.
The answer: 27
What was the question?
Question: Joel is 5 years old and his dad is 32 years old. How old will Joel be when his dad is twice as old as him?


Lance read 35 - 5 = 30 pages today. So he read a total of 35 + 30 = 65 pages in 2 days. Thus, he should read 100 - 65 = 35 pages tomorrow.
The answer: 35
Reverse engineering the question: Lance wants to finish reading a 100 page book in 3 days. Yesterday, he started to read 35 pages. Today, he read 5 fewer pages than yesterday. How many pages should he read tomorrow to finish the book?


Reasoning and answer: In her 2 albums, Beyonce releases 2 * 15 = 30 songs. In her next album, Beyonce releases 1 * 20 = 20 songs. Since each single is one song, Beyonce releases a total of 30 + 20 + 5 = 55 songs.
The answer: 55
What was the question?
Question: Beyonce releases 5 different singles on iTunes. Then she releases 2 albums that each has 15 songs and 1 album that has 20 songs. How many songs has Beyonce released in total?


It takes 3 * 20 = 60 minutes to clean the living room. So it is 60 / 60 = 1 hour. The bathroom takes 1 * 2 = 2 hours. So all together the inside takes 1 + 1 + 2 = 4 hours. The outside takes 4 * 2 = 8 hours. So the chores take 4 + 8 = 12 hours. He splits it 1 + 2 = 3 ways. So he works 12 / 3 = 4 hours.
The answer: 4
Reverse engineering the question: James does chores around the class. There are 3 bedrooms, 1 living room, and 2 bathrooms to clean. The bedrooms each take 20 minutes to clean. The living room takes as long as the 3 bedrooms combined. The bathroom takes twice as long as the living room. He also cleans the outside which takes twice as long as cleaning the house. He splits the chores with his 2 siblings who are just as fast as him. How long, in hours, does he work?


Her brother bought 6 / 3 = 2 paperbacks. He bought 4 * 2 = 8 hardbacks. In total he bought 2 + 8 = 10 books.
The answer: 10
Reverse engineering the question:
At the bookstore, Sarah bought 6 paperback books and 4 hardback books. Her brother bought one-third as many paperback books as Sarah bought, and two times the number of hardback books that she bought. How many books did her brother buy in total?