Come up with a question and reasoning that would justify [15] as the answer.
The question is: Elvis is releasing a new album with 10 songs, but he doesn't want to waste too much time on writing. He spends 5 hours in the studio, where he writes, records, and edits his songs. Each song takes 12 minutes to record, then it takes 30 minutes to edit all of his songs.  How many minutes did it take Elvis to write each song, if each song took the same amount of time to write?
Reasoning: 5 hours in the studio is the same as 5 * 60 = 300 minutes. To record all of his songs, Elvis takes 12 * 10 = 120 minutes. After editing and recording 300 – 120 – 30 = 150 minutes are left to write all of his songs. Songwriting therefore took 150 / 10 = 15 minutes per song.

Come up with a question and reasoning that would justify [35] as the answer.
The question is: A zoo has 8 parrots. It 3 times the number of snakes than parrots and 2 times the number of monkeys than snakes. The number of elephants is half the number of parrots and snakes added up, and there are 3 fewer zebras than elephants. What is the difference in number between the zebras and the monkeys?
Reasoning: The zoo has 8 x 3 = 24 snakes. It has 24 x 2 = 48 monkeys. The number of parrots and snakes added up is 8 + 24 = 32. There are 32 / 2 = 16 elephants. There are 16 - 3 = 13 zebras. The difference between zebras and monkeys is 48 - 13 = 35.

Come up with a question and reasoning that would justify [768] as the answer.

The question is: A garden produced 237 potatoes, 60 fewer cucumbers and twice as many peppers than the cucumbers. How many vegetables did the garden produce?
Reasoning: The garden produced 237 potatoes - 60 = 177 cucumbers. The garden produced 177 cucumbers * 2 peppers / cucumber = 354 peppers. The garden produced 237 potatoes + 177 cucumbers + 354 peppers = 768 vegetables.