Elise has bought a total of 15 kg + 10 kg = 25kg of dog food. This means she already had 40 kg 25 kg = 15kg of dog food.
The answer: 15
Reverse engineering the question: Elise is buying more dog food. She buys a 15kg bag then another 10kg bag, and she now has 40kg of dog food. How many kilograms of dog food did Elise already have?
Reasoning and answer: Jessica will drive 20 minutes, twice every school day (to and from school), so 20 minutes x 2 trips = 40 minutes each day. There are 60 minutes in 1 hour, so 50 hours of driving x 60 minutes / hour = 3,000 minutes. If you take the 3,000 minutes she needs to drive / 40 minutes driving each day = 75 school days to drive 50 hours.
The answer: 75
What was the question?
Question: Jessica just got her driving permit. She must complete 50 hours of driving with a parent to get her driver's license. It takes 20 minutes to drive to school. If she drives to and from school every day, how many school days will it take Jessica to meet the 50-hour driving requirement?
Last year, Bob's salary was equal to three times Mario's salary this year, meaning Bob was earning 3 * $4000 = $12000. If Bob's salary increased by 20% this year, he is earning 20 / 100 * $12000 = $2400 more. Bob's total salary this year is $12000 + $2400 = $14400.
The answer: 14400
Reverse engineering the question: Mario's salary increased by 40% to $4000 this year. Bob's salary from last year was equal to three times Mario's salary this year. If Bob's current salary is 20% more than his salary last year, what is his current salary?
Reasoning and answer: First find the number of votes for the unicorn cake: 7 votes * 3 = 21 votes. Then find the number of votes for the dragon cake: 25 votes + 7 votes = 32 votes. Then add the number of votes for each cake to find the total number of votes: 21 votes + 32 votes + 7 votes = 60 votes.
The answer: 60
What was the question?
Question: In the baking contest, three times as many people voted for the unicorn cake compared to the witch cake, and the number of votes for the dragon cake was 25 more than the number of votes for the witch cake. If 7 people voted for the witch cake, how many votes were cast total?
If the art piece was bought at $4000, and its price in three years will be three times its buying price, it will be worth 3 * $4000 = $12000 in another three years. The price of the art piece will increase by $12000 - $4000 = $8000.
The answer: 8000
Reverse engineering the question: Three years ago, Rosie purchased an art piece for $4000. The same art piece will be three times as much in another three years. How much money will the art piece have increased by?
Two weeks is 7 * 2 = 14 days. If Jason eats three eggs per day for two weeks, then he consumes 3 * 14 = 42 eggs.
The answer: 42
Reverse engineering the question:
Every morning, Jason eats an omelet made using three eggs. How many eggs will Jason consume in two weeks?