When they covered 1 / 4 of the total distance, they were 1 / 4 * 200 = 50 miles away from the starting point. The total distance remaining is 200 - 50 = 150 miles. If they took 1 hour to travel 50 miles, their speed was 50 / 1 = 50 miles per hour. If Roger was driving at 50 miles per hour, then the total time it took him to travel 150 miles is 150 / 50 = 3 hours. The total amount of time taken for the whole journey is 3 + 1 + 1 = 5 hours.
The answer: 5
Reverse engineering the question: The total distance between 2 towns is 200 miles. Roger and his friend drove 1/4 of the total distance, taking 1 hour to do so. They take lunch for another 1 hour and then drove the remaining distance going at the same speed as before. What's the total amount of time, in hours, Roger and his friend took to travel between the two towns?


Reasoning and answer: Cory takes 22 + 3 = 25 minutes to clean her room. Blake takes 25 - 4 = 21 minutes to clean his room. The three of them can clean their room in 22 + 25 + 21 = 68 minutes in all. In a week, they spend 68 x 2 = 136 minutes cleaning their rooms.
The answer: 136
What was the question?
Question: Richard can clean his room in 22 minutes. Cory takes 3 minutes more than Richard to clean her room while Blake can clean his room 4 minutes more quickly than Cory. If they have to clean their rooms twice a week, how many minutes do all three spend cleaning their rooms each week?


Jerome has 20 classmates on the list, and has half as many out of school friends on there so he has 20 / 2 = 10 out of school friends on the contact list. He has 2 parents and 1 sister on the contact list, for 2 + 1 = 3 family members on the contact list. Adding the classmates, out of school friends and family members together we get 20 + 10 + 3 = 33 people on his contact list.
The answer: 33
Reverse engineering the question: Jerome has 20 classmates on his cell phone contact list. He has half as many out of school friends as classmates on his contact list. He also has his two parents and his sister on his contact list. How many people are on Jerome's contact list?


Reasoning and answer: To find the weight of the smallest frog, 120 pounds / 10 = 12 pounds for the smallest frog. The difference is 120 - 12 = 108 pounds.
The answer: 108
What was the question?
Question: The largest frog can grow to weigh 10 times as much as the smallest frog. The largest frog weighs 120 pounds. How much more does the largest frog weigh than the smallest frog?


She will keep 1000000 / 2 = 500000 Safe Moon tokens for herself. For the remaining siblings, they will each receive 500000 / 4 = 125000 tokens. This means that Sandy will have 500000 - 125000 = 375000 tokens more than any of her siblings.
The answer: 375000
Reverse engineering the question: Sandy bought 1 million Safe Moon tokens. She has 4 siblings. She wants to keep half of them to herself and divide the remaining tokens among her siblings. After splitting it up, how many more tokens will she have than any of her siblings?


Since 1 dozen is equal to 12, then Samuel has 2 x 12 = 24 doughnuts. While Cathy has 3 x 12 = 36. They both have 24 + 36 = 60 doughnuts together. There are 8 friends + 1 (Samuel) + 1 (Cathy) = 10 that will share the doughnuts. Thus, each of them will get 60 / 10 = 6 doughnuts.
The answer: 6
Reverse engineering the question:
Samuel bought 2 dozen doughnuts and Cathy bought 3 dozen doughnuts. They planned to share the doughnuts evenly with their 8 other friends. How many doughnuts will each of them receive?