She spent $8 + $4 = $12 on books. She started with $20, so she has $20 - $12 = $8 left to spend on posters. Each poster costs $4, so she can buy $8 / $4 = 2 posters.
The answer: 2
Reverse engineering the question: Shelby had $20 to take to the book fair. She bought one book for $8 and another for $4. She decided to buy as many $4 posters as she could with the money she had left. How many posters can she buy?
Reasoning and answer: The cost of 9 plates is $2 x 9 = $18. So, Chenny paid $24 - $18 = $6 for the spoons. Therefore, she bought $6 / $1.50 = 4 spoons.
The answer: 4
What was the question?
Question: Chenny bought 9 plates at $2 each. She also bought spoons at $1.50 each. How many spoons did Chenny buy if she paid a total of $24 for the plates and spoon?
The cost of the loaves of bread is 4 $2 = $8. The cost of the milk is 2 $2 = $4. The total cost of the groceries is $8 + $4 = $12. Clare has $47 $12 = $35 left.
The answer: 35
Reverse engineering the question: Clare's mother gave her $47 to go to the store. Clare bought 4 loaves of bread and 2 cartons of milk. Each loaf of bread cost $2 and each carton of milk cost $2. How much money does Clare have left?
Reasoning and answer: We know how many aquariums Lucy can clean in a 3 - hour increment. This week, Lucy will work for 24 / 3 = 8 increments. Lucy can clean 2 aquariums per increment, so she can clean 2 x 8 = 16 aquariums.
The answer: 16
What was the question?
Question: Lucy works in a pet shop. She can clean 2 aquariums in 3 hours. If Lucy is working 24 hours this week, how many aquariums could she clean?
7.5 hours = 450 minutes. Two days = 2 * 86 = 172 minutes. 450 - 172 = 278 minutes. Adah practiced a total of 278 minutes on the other days.
The answer: 278
Reverse engineering the question: Adah practiced the cello for a total of 7.5 hours last week. He practiced for 86 minutes on each of 2 days. How many minutes in total did he practice on the other days?
He ate 2 * 1 = 2 bags after dinner. So he ate 2 + 1 = 3 bags of chips.
The answer: 3
Reverse engineering the question:
John eats a bag of chips for dinner and then eats twice as many after dinner. How many bags of chips did he eat?