So far, Jesse has read 10 + 15 + 27 + 12 + 19 = 83 pages. That's 1 / 3 of the book, so the remainder of the book is twice as many pages, or 2 * 83 = 166 pages.
The answer: 166
Reverse engineering the question: Jesse is desperately trying to finish a book for a school book report due on Monday so he can play this weekend. Friday afternoon, he read the first 5 chapters, which were 10, 15, 27, 12, and 19 pages, respectively, before taking a break. To his dismay, he found that he was only 1/3 of the way through the book. How many pages does he still have to read?


Reasoning and answer: First, we have to come up with the balance before her withdrawal. $950 (current) + $250 (withdraw) = $1200. Now since we know that is triple, we divide by 3. $1200 / 3 = $400.
The answer: 400
What was the question?
Question: The balance of Pam's bank account tripled during the year. At the end of the year, Pam withdrew $250. If her current balance is $950, how much did she have in the bank account at the beginning of the year?


The vampire and werewolf need 3 + 5 = 8 people a week. A village of 72 people will last them both 72 / 8 = 9 weeks.
The answer: 9
Reverse engineering the question: A vampire drains three people a week. His best friend is a werewolf who eats five people a week, but only fresh ones, never drained ones. How many weeks will a village of 72 people last them both?


Reasoning and answer: The farmer planted a total of 30 x 10 = 300 tomato plants. Thus, the farmer can get 300 x 20 = 6000 pieces of tomatoes.
The answer: 6000
What was the question?
Question: A farmer planted 30 rows of tomatoes with 10 plants in each row. Each tomato plant yields 20 pieces of tomatoes. How many pieces of tomatoes can the farmer get from all his planted tomatoes?


Ray gave 25 * 2 = 50 cents to Randi. Ray has 95 - 25 - 50 = 20 cents in nickels left. Ray has 20 / 5 = 4 nickels.
The answer: 4
Reverse engineering the question: Ray has 95 cents in nickels. If Ray gives 25 cents to Peter, and twice as many cents to Randi as he gave to Peter, how many nickels does Ray have left?


Angie earned 80 and paid 42 for necessities, so she had 80 - 42 = $38 left. Angie had 18 left after paying taxes, so her share of the taxes was 38 - 18 = $20 this month.
The answer: 20
Reverse engineering the question:
Angie is part of a household with shared expenses and contributes $42 a month for necessities. She has a salary of $80 per month. She also pays a share of the household taxes each month. At the end of this month, she had $18 left over. How much did she pay in taxes this month?