First find the total cost of the spellbooks by multiplying the price per book by the number of books: 5 books * 5 gold / book = 25 gold. Then add that amount to the cost of the owl: 25 gold + 28 gold = 53 gold. Now multiply that number by the conversion rate between gold and silver: 53 gold * 9 silver / gold = 477 silver. Now find the total cost of the potion kits by multiplying the price per kit by the number of kit: 3 kits * 20 silver / kit = 60 silver. Now add that amount to the cost of the books and owl to find Harry's total spending: 60 silver + 477 silver = 537 silver.
The answer: 537
Reverse engineering the question: Harry needs to buy 5 spellbooks that each cost 5 gold, three potion kits that each cost 20 silver, and one owl that costs 28 gold. There are 9 silver to a gold. How much will Harry pay total, in silvers?


Reasoning and answer: Elise has bought a total of 15 kg + 10 kg = 25kg of dog food. This means she already had 40 kg – 25 kg = 15kg of dog food.
The answer: 15
What was the question?
Question: Elise is buying more dog food. She buys a 15kg bag then another 10kg bag, and she now has 40kg of dog food. How many kilograms of dog food did Elise already have?


Let x be the number of shark sightings in Cape May. 26 = 5 + 3x. 21 = 3x. x = 7.
The answer: 7
Reverse engineering the question: Daytona Beach has 26 shark sightings a year. Daytona Beach has 5 more than triple the number of shark sightings as Cape May. How many shark sightings are there in Cape May?


Reasoning and answer: Carter is twice as tall as 24” dog so he is 2 * 24 = 48”. Betty is 12” shorter than Carter so Betty is 48 - 12 = 36” tall. 12" is the same as 1 foot so Betty is 36 / 12 = 3 feet tall.
The answer: 3
What was the question?
Question: Carter is twice as tall as his 24” tall dog. Betty is 12” shorter than Carter. How tall is Betty in feet?


First find the total number of children: 6 kids + 9 kids + 5 kids = 20 kids. Then divide the number of kids who prefer corn by the total number of kids and multiply by 100% to express as a percentage: 5 kids / 20 kids * 100% = 25%.
The answer: 25
Reverse engineering the question: 6 kids in Carolyn's daycare prefer peas, 9 prefer carrots, and 5 prefer corn. What percentage of the children prefer corn?


Mike received 3 oranges. Matt received twice as many apples as Mike received oranges, so he got 3 * 2 = 6 apples. Mark received 6 + 3 = 9 bananas. So in total, all children received 3 + 6 + 9 = 18 fruits.
The answer: 18
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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Annie is a mother of 3 children: Mark, Matt, and Mike. She decided to give them some fruits. Mike received 3 oranges. Matt got twice as many apples, and Mark got as many bananas as Mike and Matt received fruits altogether. How many fruits do the three children have in total?