On the first day, Lucca ate 1 / 4 * 200 = 50 pieces. The number of pieces remaining after the first day is 200 - 50 = 150. On the second day, Lucca ate 2 / 5 * 150 = 60 pieces of bread. The pieces of bread that remained after the second day is 150 - 60 = 90. If Lucca ate half of the remaining pieces of bread on the third day, he ate 1 / 2 * 90 = 45 pieces. The pieces of bread that are remaining after the third day are 90 - 45 = 45.
The answer: 45
Reverse engineering the question: Lucca bought 200 pieces of bread. Lucca ate 1/4 of the pieces of bread in one day, and 2/5 of the remaining pieces the next day. If he ate half of the remaining pieces on the third day, calculate how many pieces of bread are remaining.


Reasoning and answer: First find the pot's volume in ml: 3 liters * 1000 ml / liter = 3000 ml. Then find the number of ml that enter the pot per minute: 3 drops / minute * 20 ml / drop = 60 ml / minute. Then divide the volume of the pot by the volume that enters it every minute: 3000 ml / 60 ml / minute = 50 minutes.
The answer: 50
What was the question?
Question: The leak in Jerry's roof drips 3 drops a minute into the pot he put under it. Each drop is 20 ml, and the pot holds 3 liters. How long will it take the pot to be full?


2 tattoos on each arm is a total of 2 * 2 = 4 tattoos. 3 tattoos on each leg is a total of 2 * 3 = 6 tattoos. Thus, Jason has 4 + 6 = 10 tattoos. Twice the number of tattoos that Jason has is 2 * 10 = 20 tattoos. Adam has 3 more than twice the number Jason has, or 3 + 20 = 23 tattoos.
The answer: 23
Reverse engineering the question: Adam has three more than twice as many tattoos as Jason has. If Jason has two tattoos on each of his arms and three tattoos on each of his legs, how many tattoos does Adam have?


Reasoning and answer: His new computer uses 800 * .5 = 400 watts more than his old computer. So it users 800 + 400 = 1200 watts. That is 1200 / 1000 = 1.2 kw. Electricity cost 12 * .25 = 3 cents more than it used to. So it now cost 12 + 3 = 15 cents per kwh. He used 1.2 * 50 = 60 kwh. So he paid 15 * 60 = 900 cents per kwh. So he paid 900 / 100 = $9.
The answer: 9
What was the question?
Question: The price of electricity went up by 25%. John's old computer used 800 watts and his new computer uses 50% more. If the old price of electricity was 12 cents per kilowatt-hour, how much does his computer cost, in dollars, to run for 50 hours?


In an hour, Emily can type 60 words * 60 minutes = 3600 words. It will take her 10800 / 3600 = 3 hours to write 10800 words.
The answer: 3
Reverse engineering the question: Emily can type 60 words per minute. How many hours does it take her to write 10,800 words?


The number of chairs that are disposed of after they're found to be damaged is 40 / 100 * 80 = 32. The number of chairs in good condition in Kenzo's company is 80 - 32 = 48. The 48 chairs have 48 * 5 = 240 legs. The round tables also have 20 * 3 = 60 legs. In total, the furniture in Kenzo's company has 60 + 240 = 300 legs.
The answer: 300
Reverse engineering the question:
In his company, Kenzo has 80 office chairs with five legs each and 20 round tables with three legs each. If after a month 40% of the chairs are damaged and have to be disposed of, calculate the total number of legs of furniture Kenzo has remaining in his company.