He needs 1.5 * 40 = 60 pounds of potatoes. So he needs to buy 60 / 20 = 3 bags of potatoes. So it cost 3 * 5 = $15.
The answer: 15
Reverse engineering the question: James makes potatoes for a group. Each person eats 1.5 pounds of potatoes. He makes potatoes for 40 people. A 20-pound bag of potatoes costs $5. How much does it cost?


Reasoning and answer: When Kendra bought 2 toys, she paid 2 * $20 = $40. Since the price of a hat is $10, when Kendra bought 3 hats, she paid 3 * $10 = $30. The total costs for the hats and wooden toys Kendra bought is $40 + $30 = $70. From the $100 bill, Kendra received change worth $100 - $70 = $30.
The answer: 30
What was the question?
Question: The price of buying a wooden toy at the new Craftee And Best store is $20, and the cost of buying a hat is $10. If Kendra went to the shop with a $100 bill and bought two wooden toys and three hats, calculate the change she received.


Ludo bought 1 / 4 more marbles than Wolfgang, which is 1 / 4 * 16 marbles = 4 marbles. The total number of marbles that Ludo bought is 16 marbles + 4 marbles = 20 marbles. Wolfgang and Ludo purchased a total of 20 marbles + 16 marbles = 36 marbles. If Michael bought 2 / 3 times the total number of marbles bought by Wolfgang and Ludo, he bought 2 / 3 * 36 marbles = 24 marbles. The three friends purchased a total of 24 marbles + 36 marbles = 60 marbles. When they shared the marbles equally, each got 60 marbles / 3 people = 20 marbles / person.
The answer: 20
Reverse engineering the question: Three friends Wolfgang, Ludo, and Michael, went to Walmart and bought marbles. Wolfgang bought 16 marbles, Ludo bought 1/4 times more marbles than Wolfgang, and Michael bought 2/3 times as many marbles as the number of marbles both Wolfgang and Ludo bought. If they combined their marbles and decided to share them equally, how many marbles did each get?


Reasoning and answer: Knockouts:190(.50) = 95. First Round:95(.2) = 19.
The answer: 19
What was the question?
Question: Rocky boxed 190 fights in his career. 50 percent of his fights were knockouts, and 20 percent of the knockouts were in the first round. How many knockouts did Rocky have in the first round?


The wheelbarrow cost $30 because 60 / 2 = 30. The farmer earned $60 from selling fowl because 30 / (1 / 2) = 60. The farmer earned $40 selling chickens because 5 x 8 = 40. The farmer earned $20 selling ducks because 60 - 40 = 20. The farmer sold 2 ducks because 20 / 10 = 2.
The answer: 2
Reverse engineering the question: A farmer is selling ducks and chickens at the market. He sells ducks for $10 and chickens for $8. He sells 5 chickens and some ducks. He then spends half his earnings on a new wheelbarrow. After buying it, someone sees it and agrees to pay the farmer double what the farmer paid and the farmer earns another $60. How many ducks did the farmer sell?


Kara drinks 4 * 3 = 12 ounces of water with her medication each day. In a week, she drinks 12 * 7 = 84 ounces of water with her medication. In two weeks, she drinks 84 * 2 = 168 ounces of water with her medication. One day, she forgot two tablets, so she did not drink 2 * 4 = 8 ounces of water. Thus, Kara drank 168 - 8 = 160 ounces of water with her medication over two weeks.
The answer: 160
Reverse engineering the question:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
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Kara has to drink 4 ounces of water every time she takes her medication. Her medication instructions are to take one tablet three times a day. She followed the instructions for one week, but in the second week, she forgot twice on one day. How many ounces of water did she drink with her medication over those two weeks?