Jonathan has 8 + 10 = 18 letters in his name. His sister has 5 + 10 = 15 letters in her name. The total number of letters in their names is 18 + 15 = 33.
The answer: 33
Reverse engineering the question: Jonathan's full name contains 8 letters for the first name and 10 letters for the surname. His sister's name has 5 letters for the first name and 10 letters for the second name. What's the total number of letters in their names?

First find the number of complaints per day when the store is short - staffed: 120 complaints / day * 4 / 3 = 160 complaints / day. Then find the number of complaints per day when the self - checkout is broken and they're short - staffed: 160 complaints / day * 1.2 = 192 complaints / day. Then multiply the number of complaints per day by the number of days to find the total number of complaints: 192 complaints / day * 3 days = 576 complaints.
The answer: 576
Reverse engineering the question: The Jacksonville Walmart normally gets 120 customer complaints per day. That number increases by 1/3rd when they're short-staffed and this increases by another 20% when the self-checkout is broken. If the store was short-staffed and the self-checkout was broken for 3 days, how many complaints does the store get?

For the first five books, the total cost is $20 * 5 = $100. For every additional book over $5, you pay $2 less, totaling to $20 - $2 = $18. Beatrice bought 20 books, so the number of books at which she received the $2 discount is 20 - 5 = 15 books. For the 15 books, Beatrice paid 15 * $18 = $270. In total, Beatrice paid $100 + $270 = $370 for the 20 books.
The answer: 370
Reverse engineering the question: To buy a book, you pay $20 for each of the first 5 books at the supermarket, and for each additional book you buy over $20, you receive a discount of $2. If Beatrice bought 20 books, how much did she pay at the supermarket?

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:

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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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?