Reasoning and answer: Multiplying the number of students eating at the cafeteria by three means that 3 * 10 = 30 students bring lunch. The total number of students that eat lunch is 10 + 30 = 40 students. Since the class has 60 students, those who don't eat lunch are 60 - 40 = 20 students.
The answer: 20
What was the question?
Question: A class has 60 students. The number of students who bring their lunch is thrice the number of those who eat in the school cafeteria. The rest of the students don't eat lunch. If 10 students eat in the school cafeteria, how many don't eat lunch?


The plane trip is four times longer than the 2 - hour long boat trip, which means it takes 4 * 2 = 8 hours. So in total, the whole journey to "Virgo" islands lasts 8 + 2 = 10 hours.
The answer: 10
Reverse engineering the question: To get to an island called "Virgo", Tom needs to travel by plane and then by boat. The plane trip is four times longer than the boat trip, and the boat trip takes up to 2 hours. In how many hours is Tom able to get to the "Virgo" island?


Reasoning and answer: Soccer Stars won and lost a total of 14 + 2 = 16 games. This means they drew 20 - 16 = 4 games. The total points from the wins are 14 * 3 = 42 points. The total points from draws are 4 * 1 = 4 points. The total points from the losses are 2 * 0 = 0 points. They had 42 + 4 + 0 = 46 points when the season ended.
The answer: 46
What was the question?
Question: Team Soccer Stars plays in a soccer league. They played a total of 20 games, and won 14 games, lost 2, and drew the rest of the matches. They earn 3 points for a win, 1 point for a draw, and nothing for a loss. How many points did they have at the end of the season?


Instead of $12 each, an Uno Giant Family Card costs $12 - $2 = $10 each. Ivan paid $10 x 10 = $100 for the ten pieces Uno Giant Family Card.
The answer: 100
Reverse engineering the question: In a store, an Uno Giant Family Card costs $12. When Ivan bought ten pieces, he was given a discount of $2 each. How much did Ivan pay in all?


Reasoning and answer: There were 90 / 3 = 30 lollipops. So, 90 - 30 = 60 are candy canes. Each boy received 3 lollipops, so there were 30 / 3 = 10 boys. Each girl received 2 candy canes, so there were 60 / 2 = 30 girls. Altogether, there were 10 + 30 = 40 boys and girls.
The answer: 40
What was the question?
Question: Angeli had 90 assorted candies. One-third of the candies were lollipops and the rest were candy canes. She then shared the lollipops equally among the boys such that each boy received 3. She then shared the candy canes equally among the girls such that each received 2. How many boys and girls were given altogether?


Reasoning and answer: 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
What was the question?
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?