They need 1600 square feet / 400 square feet / gallon = 4 gallons of paint for their walls. Since they will do a second coating, then they would need 4 gallons x 2 = 8 gallons in all. Eight gallons of paint will cost $45 / gallon x 8 gallons = $360. Thus, Jason and Jeremy will each contribute $360 / 2 = $180.
The answer: 180
Reverse engineering the question: Jason and Jeremy want to paint their wall white and agreed to split the cost of the paint. A gallon of paint costs $45 and can cover up to 400 square feet. How much will each of them contribute to the cost of the paint if their walls have a total area of 1600 square feet and will need a second coat?


Reasoning and answer: When Jonah ran for 2 hours, burning 30 calories every hour, he burnt a total of 2 * 30 = 60 calories. If he had run for five hours, losing 30 calories every hour, Jonah would have burnt 5 * 30 = 150 calories. The difference in the number of calories Jonah would have burnt if he ran for five hours instead of 2 hours is 150 - 60 = 90 calories.
The answer: 90
What was the question?
Question: Running for 2 hours, Jonah burnt 30 calories every hour. How many more calories would he have lost if he would have run for five hours?


He had 212 sheets and received 307 more for a total of 212 + 307 = 519 sheets. He gave out 156 so he has 519 - 156 = 363 sheets.
The answer: 363
Reverse engineering the question: Fred had 212 sheets of paper. He received another 307 sheets of paper from Jane and gave Charles 156 sheets of paper. How many sheets of paper does Fred have left?


Reasoning and answer: After two years, Gary has 4 * 8 = 32 chickens. Gary collects each day 32 chickens * 6 eggs per chicken = 192 eggs. In a week he collects 192 eggs per day * 7 days per week = 1344 eggs.
The answer: 1344
What was the question?
Question: Gary buys 4 chickens. After two years, he has 8 times as many chickens as he started with. If each chicken lays 6 eggs a day, how many eggs does Gary currently collect every week?


First, figure out how many additional miles Jackson is running after four weeks: 4 weeks * 1 extra mile / week = 4 extra miles. Then add the 4 extra miles to the 3 miles he initially ran: 4 miles + 3 miles = 7 miles.
The answer: 7
Reverse engineering the question: Jackson wants to improve his endurance running. His goal is to start by running 3 miles a day the first week, then spend the next four weeks running one additional mile/day each week. How many miles is Jackson running each day at the end of this exercise program?


First find the total number of people by adding the number of passengers and flight crew: 30 people + 5 people = 35 people. Then find the total number of bags by doubling the total number of people: 35 people * 2 bags / person = 70 bags. Then find the fuel increase caused by the people by multiplying their number by the fuel increase per person: 35 people * 3 gallons / mile / person = 105 gallons / mile. Then multiply the number of bags by the fuel increase per bag to find the total fuel increase they cause: 70 bags * 2 gallons / mile / bag = 140 gallons / mile. Now add the fuel increases to the base fuel consumption to find the total fuel needed per mile: 140 gallons / mile + 105 gallons / mile + 20 gallons / mile = 265 gallons / mile. Now multiply the fuel consumption per mile by the number of miles flown to find the total amount of fuel needed: 265 gallons / mile * 400 miles = 106,000 gallons of fuel.
The answer: 106000
Reverse engineering the question:
Carol is an aviation engineer deciding how much fuel to put in a jet. The empty plane needs 20 gallons of fuel per mile. Each person on the plane increases this amount by 3 gallons per mile, and each bag increases it by 2 gallons per mile. If there are 30 passengers and 5 flight crew, and each person brought two bags, how many gallons of fuel does the plane need for a 400-mile trip?