Half his friends are boys because 1 - 1 / 2 = 1 / 2. He plays with four boys because 8 x 1 / 2 = 4.
The answer: 4
Reverse engineering the question: Ocho has 8 friends and half are girls. His friends who are boys like to play theater with him. How many boys play theater with him?


Reasoning and answer: The cost of the two laptops is 2 x $600 = $1200. The cost of the four smartphones is 4 x $400 = $1600. Thus, the total cost of all the items is $1200 + $1600 = $2800. Therefore, Celine gets a change of $3000 - $2800 = $200.
The answer: 200
What was the question?
Question: A shop sells laptops at $600 each and a smartphone at $400. Celine buys two laptops and four smartphones for her children. How much change does she get back if she has $3000?


If she divided each orange into 10 pieces, she got 80 * 10 = 800 pieces of orange. Since each friend received 4 pieces, there were 800 / 4 = 200 friends.
The answer: 200
Reverse engineering the question: Jillian had 80 oranges which she had bought to give to her friends. She divided each orange into ten equal pieces for each friend to get four pieces. How many friends were there?


Reasoning and answer: He worked for 8 - 3 = 5 days. So he worked for 5 * 8 = 40 hours.
The answer: 40
What was the question?
Question: John worked 8 hours a day every day from the 3rd to the 8th, including the 3rd and not including the 8th. How many hours did he work?


There are 12 inches in 1 foot and her room height is 8 feet so that's 12 * 8 = 96 inches tall. She wants an additional 5 inches of material added so the 96 inch long curtains will pool so she needs 5 + 96 = 101 inch long curtains.
The answer: 101
Reverse engineering the question: Cynthia wants floor-to-ceiling curtains made with an additional 5" of material so it will pool at the bottom. If her room is 8 feet tall, how long will the curtains need to be?


The perimeter of the garden is 2 * 225 + 2 * 125 = 450 + 250 = 700 feet. Minus the two gates, he will need at least 700 - 3 - 10 = 687 feet of fencing.
The answer: 687
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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Bob is building a garden on his land, and he wants it to be fenced in to keep out varmints. The garden is a rectangular plot 225 feet long by 125 feet wide. He also wants to have a small 3-foot wide gate to walk through and a larger 10-foot wide gate to move his gardening equipment through. How much fencing is Bob going to need to fence in his garden, taking into account the two gates?