Reasoning and answer: Jake has to descend 30 steps on 9 floors for a total of 9 * 30 = 270 steps. He descends 3 steps every second so he will descend 270 steps in 270 / 3 = 90 seconds. Austin will get down after only a minute (60 seconds) so Jake will get down 90 - 60 = 30 seconds later.
The answer: 30
What was the question?
Question: Austin and Jake start descending from the 9th floor of a building at the same time. Austin uses the elevator and Jake uses the stairs, descending 3 steps every second. The stairs have 30 steps across each floor. If the elevator will take a minute to get to ground level, how many seconds later will Jake get to the ground floor?


Dave buys 8 books + 6 books + 3 books = 17 books in total. He has to spend 17 books × $6 / book = $102 if he wants to buy all the books.
The answer: 102
Reverse engineering the question: Dave bought 8 books about animals, 6 books about outer space, and 3 books about trains to keep him busy over the holidays. Each book cost $6. How much did Dave spend on the books?


Reasoning and answer: Alma has 47 baby carrots to feed 3 goats, 47 / 4 = 11.75 baby carrots. If she takes away the remaining .75, each goat gets an even 11 carrots each. If Alma feeds 11 carrots to each of 4 goats, that's a total of 11 * 4 = 44 carrots Alma feeds the goats. She started with 47 baby carrots - 44 she feeds the goats = 3 baby carrots left over.
The answer: 3
What was the question?
Question: Alma is taking a walk and comes across four goats standing behind a fence. Alma has a bag of baby carrots she brought to have for a snack and decides to feed the goats with them. Alma wants to make sure all the goats get the same amount of carrots, so she starts counting them out. She has 47 baby carrots. If she wants to give the exact same amount of carrots to each goat and wants to feed them all the carrots she can, how many will she have left over?


Pria's car achieved a rate of 372 miles / 12 gallons = 31 miles per gallon. Therefore, it was a difference of 35 - 31 = 4 miles per gallon.
The answer: 4
Reverse engineering the question: Pria bought a new car that advertised an estimated gas mileage of 35 miles per gallon. The car has a 12-gallon tank. She filled her car full of gas and was able to drive a total of 372 miles. What was the difference, in miles per gallon, between Pria's mileage and the advertised mileage?


Reasoning and answer: After a year, scheme A will yield 30% of his capital which is (30 / 100) * $300 = $90. In addition to his capital, he will have $90 + $300 = $390 in scheme A. After a year, scheme B will yield 50% of his capital which is (50 / 100) * $200 = $100. In addition to his capital, he will have $100 + $200 = $300 in scheme B. After a year, he will have $390 - $300 = $90 in scheme A more than in scheme B.
The answer: 90
What was the question?
Question: An investor invested some money in 2 separate schemes: A and B. Scheme A will yield 30% of the capital within a year, and scheme B will yield 50% of the capital within a year. If he invested $300 in scheme A and $200 in B, how much more money will he have in scheme A than in B after a year, provided he does not withdraw anything?


Reasoning and answer: In the first field, there are 13 rows * 4 corn cobs / row = 52 corn cobs. In the second field, there are 16 rows * 4 corn cobs / row = 64 corn cobs. So the farm has grown a total of 52 corn cobs + 64 corn cobs = 116 corn cobs.
The answer: 116
What was the question?
Question:
A farm is growing corn in 2 fields. One of the fields has 13 full rows of corn cobs, and the other field has 16 full rows of corn cobs. If each row contains 4 corn cobs, how many corn cobs has the farm grown?