Jay spent 25 + 4 + 1 = 30 dollars. He received 50 - 30 = 20 dollars in change.
The answer: 20
Reverse engineering the question: Jay bought a book for $25, a pen for $4, and a ruler for $1. He paid with a fifty-dollar bill. How much change, in dollars, did Jay get?

Four less than a dozen is 12 - 4 = 8. The three fireflies were joined by four less than a dozen more fireflies, for a total of 3 + 8 = 11 fireflies. Two flew away, leaving 11 - 2 = 9 fireflies remaining.
The answer: 9
Reverse engineering the question: On a moonless night, three fireflies danced in the evening breeze. They were joined by four less than a dozen more fireflies, before two of the fireflies flew away. How many fireflies remained?

Kim answered 22 + 3 = 25 questions correctly. Cherry answered 25 - 8 = 17 questions correctly.
The answer: 17
Reverse engineering the question: On a quiz, Nicole answered 3 fewer questions correctly than Kim, and Kim answered 8 more questions correctly than Cherry. If Nicole answered 22 correctly, how many did Cherry answer correctly?

He walks 1.5 miles in the morning and 1.5 miles in the evening so that’s 1.5 + 1.5 = 3 miles. If he walks 3 miles everyday, for 30 days then he walks 3 * 30 = 90 miles in 30 days.
The answer: 90
Reverse engineering the question:
If Clover goes for a 1.5-mile walk in the morning and another 1.5-mile walk in the evening, every day, how many miles does he walk in 30 days?