After the birds ate 19 of the tomatoes Haruto has 127 - 19 = 108 tomatoes left. After giving half of his tomatoes to his friend, Haruto had 108 / 2 = 54 tomatoes.
The answer: 54
Reverse engineering the question: Haruto has tomato plants in his backyard. This year the plants grew 127 tomatoes. Birds had eaten 19 of the tomatoes. He picked the rest. If Haruto gave half of his tomatoes to his friend, how many tomatoes does he have left?


Reasoning and answer: 24 gallons in minus 4 gallons out is 24 - 4 = 20 gallons per second. 260 gallons divided by 20 gallons per second 260 / 20 = 13 seconds.
The answer: 13
What was the question?
Question: 24 gallons per second of water flows down a waterfall. If you have an empty basin that can hold 260 gallons of water. The basin leaks water at 4 gallons per second. how long would it take to fill the basin with water from the waterfall in seconds?


He has to climb 9 * 10 = 90 feet. That means he needs to climb 90 * 12 = 1080 inches. That means he needs to climb 1080 / 18 = 60 stairs.
The answer: 60
Reverse engineering the question: John climbs up 9 flights of stairs. Each flight is 10 feet. If each step is 18 inches, how many steps does he climb up?


Reasoning and answer: If 1 pair of earrings equals 2 earrings, then Barbie bought 12 * 2 = 24 earrings. Half of 24 earrings is 24 / 2 = 12 earrings. If receiving 12 earrings tripled Alissa's collection, then she now has 12 * 3 = 36 earrings.
The answer: 36
What was the question?
Question: Barbie enjoys buying jewelry. One day, she bought 12 pairs of earrings, and gave half of them to Alissa, making Alissa's total number of collections to be triple the number of earrings she was given. How many earrings does Alissa have now?


Muscovies: 40(.50) = 20 Muscovy ducks. Female Muscovies:20(.30) = 6 ducks.
The answer: 6
Reverse engineering the question: There are 40 ducks in a pond. 50 percent of the ducks are Muscovy and 30 percent of the Muscovies are female. How many female Muscovy ducks there?


A quart is 32 ounces so this jar is 32 - 2 = 30 ounces. James uses 3 * .5 = 1.5 ounces a day. So it last 30 / 1.5 = 20 day.
The answer: 20
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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James buys a jar of hot sauce.  Each serving is .5 ounces. He uses 3 servings every day. if the container is 2 ounces less than 1 quart how many days will it last?