Josephine filled a total of 2 x 3 = 6 liters from the three containers with two liters each. She filled a total of 0.75 x 2 = 1.5 liters from the two containers with 0.75 liters each. She filled a total of 0.5 x 5 = 2.5 liters from the five containers with 0.5 liters each. Therefore, she sold a total of 6 + 1.5 + 2.5 = 10 liters of milk.
The answer: 10
Reverse engineering the question: On a Sunday morning, Josephine sold milk in the farm stall. The buyers brought their containers. She filled three containers with two liters each, two containers with 0.75 liters each, and five containers with 0.5 liters each. How many liters of milk did Josephine sell in total?


Reasoning and answer: He used 4 - 1 = 3 pounds of beef. So he used 3 * 2 = 6 pounds of vegetables.
The answer: 6
What was the question?
Question: John buys 4 pounds of beef. He uses all but 1 pound in soup. He uses twice as many pounds of vegetables as beef. How many pounds of vegetables did he use?


D1 = 322. D3 = 2 * 322 = 644. D2 = 644 - 19 = 625. 322 + 625 + 644 = 1591. There are 1591 voters in Districts 1 - 3.
The answer: 1591
Reverse engineering the question: There are 322 voters in District 1. District 2 has 19 less voters than District 3. District 3 has twice as many voters as District 1. How many total voters are in Districts 1 - 3?


Reasoning and answer: Greta the goose eats 20 / 10 = 2 pounds of food per day. Milton the mouse eats (1 / 100) * 2 = 1 / 50 of a pound of food per day. Elmer the elephant eats 4000 * (1 / 50) = 80 pounds of food per day. Thus, Elmer eats 80 - 20 = 60 pounds more food per day than does Penelope the pig.
The answer: 60
What was the question?
Question: Penelope the pig eats 20 pounds of food per day, which is 10 times more than Greta the goose eats per day. Milton the mouse eats 1/100 as much as Greta the goose eats per day, but Elmer the elephant eats 4000 times more than Milton the mouse does per day. How much more, in pounds, does Elmer the elephant eat per day than Penelope the pig?


First find how many inches the hem is by multiplying the length in feet by the number of inches per foot: 3 feet * 12 inches / foot = 36 inches. Then divide the length in inches by the length of each stitch to find how many stitches Jenna makes: 36 inches / .25 inches = 144 stitches. Then divide the number of stitches by Jenna's stitching rate to find how long it takes her: 144 stitches / 24 stitches / minute = 6 minutes.
The answer: 6
Reverse engineering the question: Jenna is hemming her prom dress. The dress's hem is 3 feet long. Each stitch Jenna makes is 1/4 inch long. If Jenna makes 24 stitches per minute, how many minutes does it take Jenna to hem her dress?


The staff had eaten a total of 19 x 2 = 38 doughnuts. So, 50 - 38 = 12 doughnuts are left.
The answer: 12
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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During a staff meeting, 50 doughnuts were served. If each of the 19 staff ate 2 doughnuts, how many doughnuts are left?