Reasoning and answer: He sold an average of 16 books per month across all 3 months so he must have sold a total of 3 * 16 = 48 books in those 3 months. He sold 15 + 16 = 31 in January and February. He must have sold 48 - 31 = 17 books in March.
The answer: 17
What was the question?
Question: A bookseller sells 15 books in January, 16 in February and a certain number of books in March. If the average number of books he sold per month across all three months is 16, how many books did he sell in March?
Let x be the number of birds on the fence. We know that 10 + 2 * x = 50. Subtracting 10 from both sides, we get 2 * x = 50 - 10 = 40. Dividing both sides by 2, we get x = 20.
The answer: 20
Reverse engineering the question: Ten more than twice the number of birds on the fence is 50. How many birds are on the fence?
Reasoning and answer: First find how many MB are left to download: 880 MB - 310 MB = 570 MB. Then divide that number by the download speed to find the download time: 570 MB / 3 MB / minute = 190 minutes.
The answer: 190
What was the question?
Question: Mason is trying to download a 880 MB game to his phone. After downloading 310 MB, his Internet connection slows to 3 MB/minute. How many more minutes will it take him to download the game?
If he uses 6 cups of flour, the baker will be making 6 / 2 = 3 times the normal amount that the recipe describes. Thus, he must use 3 * 3 = 9 eggs.
The answer: 9
Reverse engineering the question: A baker is making bread according to a recipe that requires him to use 3 eggs for every 2 cups of flour. If the baker wants to use up the 6 cups of flour he has remaining in his pantry, how many eggs will he need to use?
Reasoning and answer: There are 22 + 17 = 39 oranges in the second bucket. There are 39 - 11 = 28 oranges in the third bucket. There's a total of 22 + 39 + 28 = 89 oranges in the three buckets.
The answer: 89
What was the question?
Question: There are three buckets full of oranges. There are 22 oranges in the first bucket, 17 more oranges in the second bucket and 11 fewer oranges in the third bucket than in the second. How many oranges are there in all the buckets?
Reasoning and answer: If Mark bought 50 cans of milk, the number of times Jennifer added 6 cans for every 5 that Mark bought is 50 / 5 = 10 times. The total number of additional cans she bought is 10 * 6 = 60 cans. If she initially had 40 cans, she went home with 40 + 60 = 100 cans of milk.
The answer: 100
What was the question?
Question:
Jennifer purchased 40 cans of milk at the store before meeting her classmate Mark, who was also buying milk. Jennifer bought 6 additional cans for every 5 cans Mark bought. If Mark purchased 50 cans, how many cans of milk did Jennifer bring home from the store?