Reasoning and answer: Mr. Llesis kept 50 x 7 / 10 = 35 kilograms of rice. So, he gave 50 - 35 = 15 kilograms of rice to Mr. Everest. Therefore, Mr. Llesis kept 35 - 15 = 20 kilograms more than Mr. Everest.
The answer: 20
What was the question?
Question: Mr. Llesis had 50 kilograms of rice. He kept 7/10 of it in storage and gave the rest to Mr. Everest. How many kilograms of rice did Mr. Llesis keep than Mr. Everest?


After Olivia gave William 10 napkins, he ends up with 15 + 10 = 25 napkins. Amelia gives William twice the number of napkins given to him by Amelia which is 2 * 10 = 20 napkins. The total number of napkins William has now is 20 + 25 = 45 napkins.
The answer: 45
Reverse engineering the question: Olivia gave William 10 napkins. Amelia also gives William twice the number of napkins Olivia gave him. If William had 15 napkins before, how many napkins does he have now?


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.


If there were beacon towers every 5 kilometers along the 7300 kilometer length of the Great Wall, then there were 7300 / 5 = 1460 beacon towers. If every tower had two soldiers, then there were a total of 1460 * 2 = 2920 soldiers in beacon towers along the Great Wall.
The answer: 2920
Reverse engineering the question: In ancient China, soldiers positioned in beacon towers along the Great Wall would send smoke signals to warn of impending attacks. Since the towers were located at 5 kilometer intervals, they could send a signal the length of the Great Wall. If the Great wall was 7300 kilometers long, and every tower had two soldiers, what was the combined number of soldiers in beacon towers on the Great Wall?


Reasoning and answer: He spent 20 - 8 = $12 on Slurpees. So he got 12 / 2 = 6 Slurpees.
The answer: 6
What was the question?
Question: John goes to the store to buy Slurpees and gives them $20. Slurpees cost $2 each and he got $8 in change. How many Slurpees did he buy?


Reasoning and answer: Twice 1.5 hours is 2 * 1.5 = 3 hours. Thus, on that day, it took Matthew 1 + 3 + 1 = 5 hours to make the cakes.
The answer: 5
What was the question?
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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Matthew, the baker, arrives at work early every morning to make his famous caramel-apple coffee cakes for the day. It usually takes Matthew 1 hour to assemble ingredients, 1.5 hours to bake the cakes, and another 1 hour to decorate each cake with cinnamon sprinkles. One day, Matthew's oven failed to reach the correct temperature and it took twice as long for the cakes to bake as they usually take. On that day, how long did it take, in hours, for Matthew to make his famous caramel-apple coffee cakes?