Reasoning and answer: Roger has 35 x 2 = 70 apps on his phone. He needs to delete 70 - 50 = 20 apps.
The answer: 20
What was the question?
Question: For Roger's phone to function optimally, he can have a maximum of 50 apps on his phone. However, the recommended number of apps is 35. If Roger has twice the recommended number of apps, how many apps must he delete for his phone to function optimally again?


Jeremy and Stacy buy 3 + 4 = 7 bags of chips. Since there needs to be 10 total, Emily should buy 10 - 7 = 3 bags of chips.
The answer: 3
Reverse engineering the question: Jeremy buys 3 bags of chips for a party. Stacy and Emily also buy chips for the party. If they need 10 bags of chips total, and Stacy buys 4 bags, how many bags of chips should Emily buy?


Reasoning and answer: If Emery took twenty days to read the book, then it took Serena 5 * 20 = 100 days to read the whole book. The total number of days taken by the two to read the book is 100 + 20 = 120 days. The average number of days the two take to read the book is 120 / 2 = 60 days.
The answer: 60
What was the question?
Question: Emery and Serena go to their school library, and each borrows a copy of The life of Jack Steve's book to read for their school project. If Emery can read five times as fast as Serena, and the book takes her 20 days to read, what's the average number of days the two take to read the book?


The number of boxes already sold is 12 + 5 + 4 = 21. Kaylee needs to sell 33 − 21 = 12 more boxes.
The answer: 12
Reverse engineering the question: Kaylee needs to sell 33 boxes of biscuits. So far, she has sold 12 boxes of lemon biscuits to her aunt, 5 boxes of chocolate biscuits to her mother, and 4 boxes of oatmeal biscuits to a neighbor. How many more boxes of biscuits does Kaylee need to sell?


Reasoning and answer: First find the total volume of the Mountain Dew: 6 cans * 12 oz / can = 72 oz. Then find the total volume of the punch: 72 oz + 28 oz + 40 oz = 140 oz. Then divide the total volume by the volume of each serving to find the number of servings: 140 oz / 10 oz / serving = 14 servings.
The answer: 14
What was the question?
Question: Carrie is making punch. She adds 6 12-oz cans of Mountain Dew, 28 oz of ice, and a 40 oz bottle of fruit juice. How many 10 oz servings of punch does Carrie have?


Reasoning and answer: After giving a box to his mom, Seth had 4 * 2 = 8 boxes left. Seth bought 8 + 1 = 9 boxes of oranges.
The answer: 9
What was the question?
Question:
Seth bought some boxes of oranges. He gave a box to his mother. He then gave away half of the remaining boxes. If Seth has 4 boxes of oranges left, how many boxes did he buy in the first place?