Reasoning and answer: Yesterday, Uncle Welly was able to plant 50 + 20 = 70 roses. Today, he planted 2 x 50 = 100 roses. Therefore, Uncle Welly has 50 + 70 + 100 = 220 roses planted on his vacant lot.
The answer: 220
What was the question?
Question: Two days ago, Uncle Welly planted 50 roses on his vacant lot. Yesterday, he planted 20 more roses than the previous day. Today, he planted twice the number of roses than two days ago. How many roses did Uncle Welly plant in his vacant lot?
Darryl paid 3600 + 4500 = $8100 in costs for the parts and patent. Thus, Darryl needs to sell 8100 / 180 = 45 machines to break even.
The answer: 45
Reverse engineering the question: Darryl is an inventor who just designed a new machine. He had to pay $3600 for the parts to construct the machine, and $4500 for the patent he applied for once he built it. If the machine sells for $180, how many machines does Darryl need to sell to break even after the costs?
Reasoning and answer: Combining the three classes, there are 17 + 14 + 15 = 46 male students. Similarly, there are 13 + 18 + 17 = 48 female students. Thus, there are 48 - 46 = 2 students who cannot partner with a student of the opposite gender.
The answer: 2
What was the question?
Question: Three different 6th grade classes are combining for a square dancing unit. If possible, the teachers would like each male student to partner with a female student for the unit. The first class has 17 males and 13 females, while the second class has 14 males and 18 females, and the third class has 15 males and 17 females. When the classes are combined, how many students will be unable to partner with a student of the opposite gender?
First find the total time Billy spends on laundry: 2 loads * 9 minutes / load = 18 minutes. Then find the total time Anna spends sweeping: 3 minutes / room * 10 rooms = 30 minutes. Then find how much longer Anna has already worked than Billy: 30 minutes - 18 minutes = 12 minutes. Then divide the difference in work time by the time to wash one dish to find the number of dishes Billy has to wash to work the same amount of time as Anna: 12 minutes / 2 minutes / dish = 6 dishes.
The answer: 6
Reverse engineering the question: Carla is dividing up chores for her two kids, Anna and Billy. She wants each of them to spend the same number of minutes working. Sweeping takes 3 minutes per room, washing the dishes takes 2 minutes per dish, and doing laundry takes 9 minutes per load. If Anna does the sweeping for 10 rooms and Billy does two loads of laundry, how many dishes should Billy wash so they spend the same amount of time doing chores?
Reasoning and answer: Every tray needs 80 cookies and she's making 3 trays so 8 * 3 = 240. Every box of cookies has 60 cookies. She needs 240 cookies so 240 / 60 = 4 boxes. The boxes cost $3.50 each and she needs 4 boxes so 3.50 * 4 = $14.00.
The answer: 14
What was the question?
Question: Brenda volunteered to make 3 trays of banana pudding for the family reunion. Each tray of banana pudding would need 80 wafer cookies. A box of wafer cookies only had 60 cookies per box. Each box costs $3.50. How much will it cost her to buy just enough boxes for 3 trays of banana pudding?
Reasoning and answer: Chandler has sold 3 rolls + 4 rolls + 3 rolls = 10 rolls. Chandler still needs to sell 12 rolls 10 rolls = 2 rolls.
The answer: 2
What was the question?
Question:
For a school fundraiser, Chandler needs to sell 12 rolls of wrapping paper. So far, he has sold 3 rolls to his grandmother, 4 rolls to his uncle, and 3 rolls to a neighbor. How many more rolls of wrapping paper does Chandler need to sell?