Greg kept 1 granola bar for each of the 7 days of the week, so there were 20 - 7 = 13 bars left. He traded 3 to his friend Pete, so there were 13 - 3 = 10 bars left. His 2 sisters split the rest evenly, so each got 10 / 2 = 5 granola bars.
The answer: 5
Reverse engineering the question: Greg bought a 20-pack of granola bars to eat at lunch for the week. He set aside one for each day of the week, traded three of the remaining bars to his friend Pete for a soda, and gave the rest to his two sisters. How many did each sister get when they split them evenly?


Reasoning and answer: The mural is 20 * 15 = 300 square feet. So it takes him 300 * 20 = 6000 minutes. So he paints it in 6000 / 60 = 100 hours. That means he charges 100 * 150 = $15000.
The answer: 15000
What was the question?
Question: James paints a 20 ft by 15 ft mural. It takes him 20 minutes to paint 1 square foot and he charges $150 per hour. How much does he charge to paint the mural?


When she orders 30 boxes, the total number of packs in the boxes is 30 * 40 = 1200 packs. If a pack has 160 diapers, 1200 packs contain 1200 * 160 = 192000 diapers. After selling all the diapers, Meadow gets 192000 * $5 = $960000.
The answer: 960000
Reverse engineering the question: Meadow has a business that sells baby diapers to her local townspeople. She orders 30 boxes of diapers containing 40 packs weekly, with each pack having 160 diapers. She sells each diaper for $5. How much money is Meadow making from selling all her diapers?


Reasoning and answer: If "x" is the number of European swallows, then, for every one European swallow, there would be 2x American swallows. Thus, the total number of swallows would be 2x + x = 90 swallows. Thus, the number of European swallows x = 30. And the number of American swallows is 90 - 30 = 60. A European swallow can carry twice what an American swallow can carry, or 2 * 5 = 10 pounds. 30 European swallows can carry a maximum of 30 * 10 = 300 pounds. 60 American swallows can carry a maximum of 60 * 5 = 300 pounds. Thus, a flock of 90 birds, with 30 European and 60 American swallows, can carry 300 + 300 = 600 pounds.
The answer: 600
What was the question?
Question: The American swallow can lift into the air and carry a maximum of 5 pounds of weight, while the European swallow can lift and carry twice the weight as the American swallow. If there was a flock of 90 swallows, containing twice as many American as European swallows, what is the maximum combined weight the flock can carry?


A week's worth of rawhide bones cost 1 * 2 * 7 = 14 dollars. A week's worth of dog biscuits cost 0.25 * 4 * 7 = 7 dollars,. Thus, in total, it cost 14 + 7 = 21 dollars.
The answer: 21
Reverse engineering the question: Belle eats 4 dog biscuits and 2 rawhide bones every evening. If each rawhide bone is $1, and each dog biscuit is $0.25, then how much does it cost, in dollars, to feed Belle these treats for a week?


If 30 kids each make 8 cards, they will have made 240 cards because 30 * 8 = 240. Since 1000 - 240 = 760, they need to make 760 more cards.
The answer: 760
Reverse engineering the question:
Maddy's 4th grade class needs to make 1000 Valentine's Day cards to get a pizza party. There are 30 kids in the class. If everyone makes 8, how many more cards will they need to make to get a pizza party?