Her friend will pay $5 x 7 = $35 after 7 days. Her brother will pay $8 x 7 = $56 after 7 days. Her cousin will pay $4 x 7 = $28 after 7 days. Therefore, she will be able to collect $35 + $56 + $28 = $119 after 7 days.
The answer: 119
Reverse engineering the question: Margaux owns a money lending company. Her friend pays her $5 per day, her brother $8 per day, and her cousin $4 per day. How much money will she collect after 7 days?
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?
From Danny, there are 3 * 10 = 30 watermelon slices. From his sister, there are 1 * 15 = 15 watermelon slices. There are a total of 30 + 15 = 45 watermelon slices.
The answer: 45
Reverse engineering the question: Danny brings 3 watermelons to his family picnic. He cuts each watermelon into 10 slices. His sister brings 1 watermelon to the family picnic, and she cuts the watermelon into 15 slices. How many watermelon slices are there in total at the picnic?
Reasoning and answer: There were 120 / 3 = 40 men at the party. There were 120 / 2 = 60 women at the party. So, there were 40 + 60 = 100 men and women at the party. Thus, 120 - 100 = 20 were children.
The answer: 20
What was the question?
Question: Out of the 120 people who attended the party, 1/3 are men while half are women. The rest are children. How many children attended the party?
If Kelly weighs 15% less than Megan, this means Kelly's weight is 100 - 15 = 85% of Megan's weight. 85% is 0.85, so Megan weighs 34 / 0.85 = 40 kilograms. Mike weighs 5 kilograms more than Megan, so he weighs 40 + 5 = 45 kilograms. In total all three kids weigh 34 + 40 + 45 = 119 kilograms. That means to cross the bridge safely, they weigh 119 - 100 = 19 kilograms too much.
The answer: 19
Reverse engineering the question: A small, old, wooden bridge can hold up to 100 kilograms at once. Mike, Megan, and Kelly are three children who decided to cross the bridge at the same time. Kelly weighs 34 kilograms, which is 15% less than Megan. Mike weighs 5 kilograms more than Megan. How much too much do the three children weigh together to cross the bridge?
The total planned cost for the party was 100 * 50 = $5000. The total expenses for the party are 5000 - 500 = $4500.
The answer: 4500
Reverse engineering the question:
Hally and her friends organized a high school reunion. To cover the cost of a late-night party that they planned for at the reunion, each attendee had to pay $100. After the party, Hally and her friends realized that the total expenses were $500 less than the total contributions. If there were 50 people at the party, how much money was used to pay for the party expenses?