Randy has only half as many water balloons as Janice’s 6, for a total of (½) * 6 = 3 water balloons. Cynthia has 4 times as many water balloons as Randy, for a total of 4 * 3 = 12 water balloons.
The answer: 12
Reverse engineering the question: Cynthia has four times as many water balloons as her husband, Randy. Randy has only half as many water balloons as his daughter, Janice. If Janice throws all 6 of her water balloons at her father, how many water balloons does Cynthia have, which she could also choose to throw at Randy?


Reasoning and answer: If the fan works for 10 minutes each day, in a week with 7 days, it will have worked for 10 * 7 = 70 minutes. Since a minute has 60 seconds, the total time in seconds that the fan will have worked in one week is 70 * 60 = 4200 seconds. Since the fan can create an airflow of 10 liters per second, in 4200 seconds, it will create an airflow of 4200 * 10 = 42000 liters.
The answer: 42000
What was the question?
Question: A fan can create an airflow of 10 liters per second. If the fan works for 10 minutes each day, calculate the amount of airflow it will create in one week.


First, find the total number of points Carl needs to earn across all the tests by multiplying his desired average by the number of tests: 85 * 4 = 340 marks. Then subtract all Carl's previous test scores to find the last score he needs to earn: 340 - 80 - 75 - 90 = 95 marks.
The answer: 95
Reverse engineering the question: Carl is taking a class where the whole grade is based on four tests that are graded out of 100. He got an 80, a 75 and a 90 on his first three tests. If he wants an 85 average for the class, what is the minimum grade he needs to get on his last test?


Reasoning and answer: The first sister has 5 pieces of clothing because 10 / 2 = 5. The next sister had 12 pieces of clothing because 10 + 2 = 12. The three youngest sisters combined have 27 pieces because 10 + 5 + 12 = 27. The oldest has 9 pieces because 27 / 3 = 9. Nicole ends up with 36 pieces of clothing because 10 + 5 + 12 + 9 = 36.
The answer: 36
What was the question?
Question: Nicole has three older sisters. After each one outgrows their clothes, they give them to Nicole. They have all outgrown their clothes and have given them all to Nicole. Nicole started with 10 pieces of clothing. Her first older sister had half as many clothes as Nicole. The next oldest sister had 2 more pieces of clothing than Nicole. The oldest had the average of what her three younger sisters had. How many pieces of clothing does Nicole end up with?


Chandler and Lucy can eat 23 + 19 = 42 apples per week. Therefore, they have to order 42 x 4 = 168 apples for a month.
The answer: 168
Reverse engineering the question: Chandler can eat a total of 23 apples and Lucy can eat a total of 19 apples per week. If the farmer only delivers 1 time per month, how many apples do they have to order for a month?


He uses 3 detergent pods a week and there are 52 weeks in a year, so he uses 3 * 52 = 156. His detergent has 39 pods per pack and he needs 156 pods, so he will need 156 / 39 = 4 packs of detergent pods.
The answer: 4
Reverse engineering the question:
Hayes does 3 loads of laundry a week using a detergent pod for each load. His detergent pods come 39 to a pack. How many packs of detergent pods will he need to do a full year of laundry?