The parking lot is 400 * 500 = 200,000. There are 200,000 * .8 = 160,000 square feet of parking space. That means he can park 16,0000 / 10 = 16000 cars.
The answer: 16000
Reverse engineering the question: James paves a new parking lot. It is 400 feet by 500 feet. Only 80% of that is useable for parking. It takes 10 square feet to park a car. How many cars can be parked?


Reasoning and answer: On 80 games, Daniel spend 80 games * $12 / game = $960. The rest of the collection is 346 games - 80 games = 266 games. 50% of these games means 50 / 100 * 266 games = 133 games. Daniel bought them for $7 each, so he had to spend 133 games * $7 / game = $931 on them. The other 133 games were bought for $3 each, so they've cost him 133 games * $3 / game = $399. On all games in total Daniel spent $960 + $931 + $399 = $2290.
The answer: 2290
What was the question?
Question: Daniel has a collection of 346 video games. 80 of them, Daniel bought for $12 each. Of the rest, 50% were bought for $7. All others had a price of $3 each. How much did Daniel spend on all the games in his collection?


Ignatius has 8 tires because 2 x 4 = 8. His friend has 24 tires because 3 x 8 = 24. There are 20 bicycle wheels because 24 - 1 - 3 = 20. He has 10 bicycles because 20 / 2 = 10.
The answer: 10
Reverse engineering the question: Ignatius owns 4 bicycles. A friend of his owns different types of cycles, which have three times are many tires as Ignatius's bikes have. He has one unicycle, a tricycle, and the rest are bikes. How many bicycles does the friend own?


Reasoning and answer: Since Marion received 20 more turtles than Martha, she had 20 + 40 = 60 turtles. Together, the two received 60 + 40 = 100 turtles.
The answer: 100
What was the question?
Question: Marion received 20 more turtles than Martha at the animal rescue center where they had gone to take part in the animal saving day event. If Martha received 40 turtles, how many turtles did they receive together?


First find how much money Bill makes every week by multiplying his hourly rate by the number of hours he works each week: $25 / hour * 30 hours / week = $750 / week. Then multiply that number by the number of weeks per month to find his monthly earnings: $750 / week * 4 weeks / month = $3,000 / month. Then multiply his monthly earnings by the number of months in a year to find his annual income: $3,000 / month * 12 months / year = $36,000 / year. This income means Bill gets a 50% monthly healthcare subsidy from the government. Multiply the cost of the premium by 50% to find the monthly cost Bill pays: $500 / month * .5 = $250 / month. Finally, multiply Bill's monthly cost by the number of months in a year to find his annual cost: $250 / month * 12 months / year = $3,000 / year.
The answer: 3000
Reverse engineering the question: Bill is buying healthcare on an exchange. The normal monthly price of the plan he wants is $500. The government will pay for part of this cost depending on Bill's income: 90% if he makes less than $10,000, 50% if he makes between $10,001 and $40,000, and 20% if he makes more than $50,000. Bill earns $25/hour and works 30 hours per week, four weeks per month. How much will Bill spend for health insurance in a year?


His partner has been teaching for 40 - 10 = 30 years. So together they have 40 + 30 = 70 years of experience.
The answer: 70
Reverse engineering the question:
James spends 40 years teaching. His partner has been teaching for 10 years less. How long is their combined experience?