He found 12 and his grandparents gave him three times that amount so he got 12 * 3 = 36 cans from his grandparents. All total he collected 12 cans, the 36 from his grandparents, 46 from the neighbor and 250 from his dad for a total of 12 + 36 + 46 + 250 = 344 cans. Each can is worth $0.25 so .25 * 344 = $86.00. He agreed to put half of the $86 earned into savings so he will save 86 / 2 = $43.00.
The answer: 43
Reverse engineering the question: Collin learned that he could earn $0.25 per aluminum can that he brought into the recycling center. He found 12 cans at home and three times as many at his grandparents' house.  His neighbor gave him 46. His dad brought home 250 cans from the office. His dad told him he could keep the money from the cans he brought home from the office if he promised to put half of his entire amount collected into savings. How much money would Collin have to put into savings?


Reasoning and answer: Carlos read 28 books + 30 books = 58 books. He needed to read 100 books - 58 books = 42 books in June.
The answer: 42
What was the question?
Question: Carlos read 28 books in July and 30 books in August. He needed to read 100 books during his summer vacation. If Carlos read some of the books in June, calculate the number of books that Carlos read in June to meet his goal?


There are 5 * 20 = 100 tanks in the yard. Altogether, there are 100 + 20 = 120 trucks and tanks in the yard.
The answer: 140
Reverse engineering the question: In a yard, the number of tanks is five times the number of trucks. If there are 20 trucks in the yard, calculate the total number of tanks and trucks in the yard.


Reasoning and answer: There are C cans of cherry soda in the cooler. There are twice as many cans of orange pop, so there are 2C cans of orange pop in the cooler. In all, there are C + 2C = 3C = 24 cans in the cooler. Therefore, there are C = 24 / 3 = 8 cans of cherry soda in the cooler.
The answer: 8
What was the question?
Question: A cooler is filled with 24 cans of cherry soda and orange pop. If there are twice as many cans of orange pop as there are of cherry soda, how many cherry sodas are there?


Dog:9 - 3 = 6 lives. Mouse:6 + 7 = 13 lives.
The answer: 13
Reverse engineering the question: A cat has nine lives. A dog has 3 less lives than a cat. A mouse has 7 more lives than a dog. How many lives does a mouse have?


There are 40 / 2 = 20 women at the event. Hence, there are a total of 40 + 20 = 60 men and women at the event. So, the total number of children at the event is 80 - 60 = 20. After Oleg added 10 children to the guest list, there are a total of 20 + 10 = 30 children.
The answer: 30
Reverse engineering the question:
Oleg is an event organizer. He is organizing an event with 80 guests where 40 of them are men, half the number of men are women, and the rest are children. If he added 10 children to the guest list, how many children will there be at the event?