First find the number of pinecones eaten by reindeer: 20% * 2000 pinecones = 400 pine cones. Then find the total number of pinecones eaten by squirrels: 400 pine cones * 2 = 800 pine cones. Then subtract those two amounts to find the number of pinecones left: 2000 pinecones - 400 pine cones - 800 pine cones = 800 pinecones. Divide that number by 4 to find the number that are collected for fires: 800 pinecones / 4 = 200 pine cones. Then subtract that number from the 800 pinecones to find the total left on the ground: 800 pine cones - 200 pinecones = 600 pine cones.
The answer: 600
Reverse engineering the question: There are 2000 pinecones on the ground. 20% are eaten by reindeer. Twice as many are eaten by squirrels as reindeer. 25% of the remainder are collected to make fires. How many pinecones are left?


Reasoning and answer: If we assume that the number of trucks on the highway is t, the number of cars on the highway will be 2 * t = 2t. The total number of cars and trucks on the road is 2t + t = 300. The number of vehicles on the road is 3t = 300. The are t = 300 / 3 trucks on the highway. This means there are t = 100 trucks on the road.
The answer: 100
What was the question?
Question: On a highway, the total number of vehicles passing is 300. If the number of cars on the highway is twice the number of trucks, find out the total number of trucks on the highway?


In 22 days she will have 22 days * $2 / day = $44. A flower costs $4 so she can buy $44 / $4 / flower = 11 flowers.
The answer: 11
Reverse engineering the question: Maria's birthday is in 22 days. Her friend Lilly wants to buy her flowers so she saves $2 each day until Maria's birthday. If a flower costs $4, how many flowers can she buy?


Reasoning and answer: You save $5 per chair with the 25% off sale. On sale chairs cost $15 each because 20 - 5 = 15. You bought 3 chairs above the 5 required before the extra savings starts because 8 - 5 = 3. You save an extra $5 on these chairs because 15 x (1 / 3) = 5. The first five chairs cost $75 in total because 5 x 15 = 75. The final three chairs cost $30 in total because 3 x 10 = 30. In total they cost $105 because 75 + 30 = 105.
The answer: 105
What was the question?
Question: Big Lots is having a sale. All chairs are 25% off. If you buy more than 5 chairs, you get an additional 1/3 off the discounted price of the number of chairs over 5. If you bought 8 chairs that were normally priced at $20, how much do the chairs cost in total?


He makes 60 / 4 = 15 in the first hour. He makes 60 / 6 = 10 in each subsequent hour. There are 4 - 1 = 3 more hours in his shift. He makes 15 + 10 * 3 = 45.
The answer: 45
Reverse engineering the question: For the first hour of work, Manolo can make face-masks at the rate of one every four minutes. Thereafter, he can make face-masks at the rate of one every six minutes. How many face-masks does Manola make in a four-hour shift?


The price of a personal computer is $300 + $500 = $800. The price of an advanced tablet would be $300 + $800 = $1100. To buy each of these products, you would have to pay $300 + $800 + $1100 = $2200.
The answer: 2200
Reverse engineering the question:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
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An electronic shop offers smartphones for $300 each, personal computers for $500 more than smartphones, and advanced tablets for the sum of the prices of a smartphone and personal computer. How much do you have to pay to buy one of each of the three mentioned products?