Reasoning and answer: Derek has 40 - 14 - 11 - 5 = 10 dollars left. Dave has 50 - 7 = 43 dollars left. Dave has 43 - 10 = 33 more dollars left than Derek.
The answer: 33
What was the question?
Question: Derek has $40. He spends $14 on lunch for himself, $11 for lunch for his dad, and $5 on more lunch for himself. His brother Dave has $50 and only spends $7 on lunch for his mom. How much more money does Dave have left than Derek?


He got 1200 * 500 = $600,000 from maxed donors. The smaller donors donated 1200 / 2 = $600. He had 500 * 3 = 1500 of these donors. So they donated 1500 * 600 = $900,000. So large donations where worth 900,000 + 600,000 = $1,500,000. So he raised 1,500,000 / .4 = $3750000.
The answer: 3750000
Reverse engineering the question: Tim decides to run a campaign for governor. He gets the maximum $1200 donation from 500 people, and three times as many people donated half this sum of money to his campaign. These donations together accounted for 40% of the total money that Tim raised. How much total money did he raise?


Reasoning and answer: If Kenneth bought 700oz of fabric at $40 per oz, he spent a total of 700 * 40 = $28000. Nicholas bought six times as much fabric as Kenneth, meaning Nicholas bought 6 * 700 = 4200oz of fabric. If an oz of fabric is sold at $40, Nicholas paid 4200 * $40 = $168000 for the 4200oz of fabric. The amount of money that Nicholas paid more than Kenneth for the fabric he bought is $168000 - 28000 = $140000.
The answer: 140000
What was the question?
Question: Nicholas bought six times as much fabric as Kenneth. If Kenneth paid $40 for an oz of fabric and bought 700oz, calculate the amount of money that Nicholas paid more than Kenneth for the fabric he bought.


Katherine has a total of 3 * 4 apples = 12 pears. She therefore had 4 apples + 12 pears = 16 apples and pears. We know she has 21 total pieces of fruit, so this means she must have 21 total - 16 = 5 bananas.
The answer: 5
Reverse engineering the question: If Katherine has 4 apples and 3 times as many pears in her fridge, how many bananas does she have if she has a total of 21 pieces of fruit?


Reasoning and answer: Since 5 rooms have 4 windows, this accounts for 20 windows because 4 * 5 = 20 windows. Since 8 rooms have 3 windows, this accounts for 24 windows because 8 * 3 = 24 windows. There are 78 windows left over because 122 - 20 - 24 = 78. Therefore, there are 39 rooms with 2 windows because 78 / 2 = 39.
The answer: 39
What was the question?
Question: Every room in a building has at least two windows and a maximum of 4 windows. There are 122 windows total. If 5 rooms have 4 windows and 8 rooms have 3 windows, how many rooms in the building have 2 windows?


Reasoning and answer: The meals cost 16 + 14 = $30. So each paid 30 / 2 = $15. James left a tip of 30 * .2 = $6. So James paid 15 + 6 = $21.
The answer: 21
What was the question?
Question:
James goes out to eat. He orders a steak and egg meal for $16. He is with his friend, who orders chicken fried steak for $14. His friend pays for half the bill and James pays the tip along with his half of the bill. They tip 20%. How much did James pay?