He read 600 / 40 = 15 hours per week. So now he reads 15 - 4 = 11 hours per week. She now reads 40 * 1.5 = 60 pages per hour. So she reads 11 * 60 = 660 pages per week.
The answer: 660
Reverse engineering the question: Jim reads at a rate of 40 pages an hour. He reads a total of 600 pages per week. He increases his reading speed to 150% of its former speed but reads 4 hours less per week. How many pages does he read a week now?


Reasoning and answer: There were 20 - 5 = 15 units of non - defective smartphones. There were 3 + 7 = 10 units sold to customers A and C. So, 15 - 10 = 5 units were sold to customer B.
The answer: 5
What was the question?
Question: A store is selling mobile phones. This store contains 20 units of phones but the owner found out that there were 5 defective units. After he got rid of the defective units, he started to sell the rest of his units to customer A who bought 3 units, customer B who bought a certain amount of units, and customer C who bought 7 units. In the end, all non-defective units were sold. How many units were sold to Customer B?


The number of stores required for the new city is 2000 / 2 = 1000 stores. The number of hospitals required for the new city is 2 * 500 = 1000 hospitals. The number of schools required for the new city is 200 - 50 = 150 schools. The number of police stations required for the new city is 20 + 5 = 25 police stations. The total number of buildings required for this new city project 1000 + 1000 + 150 + 25 = 2175 buildings.
The answer: 2175
Reverse engineering the question: Jacob has been tasked with a project to write up an urban plan proposal that will be used to construct a new city. He uses Pittsburg city as a reference which has 2000 stores, 500 hospitals, 200 schools, and 20 police stations. If the new city should have half the number of stores, twice as many hospitals, 50 fewer schools, and 5 more police stations, what is the total number of buildings required for this project?


Reasoning and answer: The first 7 days were $190. There were 11 - 7 = 4 days left. The additional 4 days were 4 * 30 = 120. And 190 + 120 = 310.
The answer: 310
What was the question?
Question: The car-rental agency charges $30/day for a car, or $190 for the first week for a rental that lasts an entire week or longer. Jennie rented a car for 11 days. How much, in dollars, did she pay for the rental?


To make the yogurts, Vivian needs 5 x 8 = 40 banana slices. She needs to buy 40 / 10 = 4 bananas.
The answer: 4
Reverse engineering the question: Each yogurt is topped with 8 banana slices. One banana will yield 10 slices. If Vivian needs to make 5 yogurts, how many bananas does she need to buy?


He swam 2 * 2 = 4 miles. He ran for 2 / 2 = 1 hour. His running speed was 2 * 4 = 8 mph. So he ran 8 * 1 = 8 miles. So his total distance was 8 + 4 = 12 miles.
The answer: 12
Reverse engineering the question:
Tom swims for 2 hours at a speed of 2 miles per hour. He then runs for half the time at 4 times the speed. How many miles did he cover?