Five dozens of people is equal to 5 x 12 = 60. 60 x 2 = 120 cans of soda are needed. So, this means 120 / 10 = 12 boxes of soda must be purchased. Thus, it will amount to $2 x 12 = $24. Therefore, each family member will pay $24 / 6 = $4.
The answer: 4
Reverse engineering the question: Five dozens of people are attending your family reunion. Your family was assigned to bring the cans of soda. Each box of soda contains 10 cans and costs $2 per box. It was assumed that each person can consume 2 cans of soda. If you are six in the family and agreed to pay equally for the cost, how much will each of your family members pay?

The store owner ordered a total of 20 + 30 = 50 cases. This is equal to 50 x 20 = 1000 bottles of soda.
The answer: 1000
Reverse engineering the question: A store owner ordered 20 cases of bottles of soda in April and 30 cases in May. There are 20 bottles per case. How many bottles of soda did the store owner order in April and May?

Haley held 8 marshmallows. Michael held 3 times Haley's, so he held 8 x 3 = 24 marshmallows. Brandon held half as many marshmallows as Michael, so he held 24 / 2 = 12 marshmallows. Together, they held 8 + 24 + 12 = 44 marshmallows.
The answer: 44
Reverse engineering the question: Haley, Michael and Brandon were trying a marshmallow challenge to see who could hold more marshmallows in their mouths. Haley could hold 8 marshmallows in her mouth. Michael could hold 3 times as many marshmallows as Haley. Brandon could hold half as many as Michael. How many total marshmallows did all three kids hold in their mouths?

24 gallons in minus 4 gallons out is 24 - 4 = 20 gallons per second. 260 gallons divided by 20 gallons per second 260 / 20 = 13 seconds.
The answer: 13
Reverse engineering the question:
24 gallons per second of water flows down a waterfall. If you have an empty basin that can hold 260 gallons of water. The basin leaks water at 4 gallons per second. how long would it take to fill the basin with water from the waterfall in seconds?