Reasoning and answer: During one minute the metro sells 5 tickets, so they earn 5 * 3 = $15. So in 6 minutes they would earn 15 * 6 = $90.
The answer: 90
What was the question?
Question: One ticket to the underground costs $3. In one minute, the metro sells an average of 5 such tickets. What will be the earnings from the tickets in 6 minutes?


The price per egg in a tray is $12 / 30 eggs = $0.4 / egg. The equivalent of $0.4 in cents is $0.4 x 100 cents / dollar = 40 cents. Hence, you can save 50 cents - 40 cents = 10 cents per egg if you buy a tray.
The answer: 10
Reverse engineering the question: The price per organic egg is 50 cents. The price of a tray of eggs that contains 30 eggs is $12. How much can you save, in cents, per egg if you buy a tray versus individual eggs?


Reasoning and answer: Jack's till has 2 * $100 + 1 * $50 + 5 * $20 + 3 * $10 + 7 * $5 + 27 * $1 bills, or $200 + $50 + $100 + $30 + $35 + $27 = $442. He's going to leave $300 in the till and turn the rest in to the office, so he'll be turning in $442 - $300 = $142.
The answer: 142
What was the question?
Question: Jack is counting out his register at the end of his shift in the shop. His till has 2 $100 bills, 1 $50 bill, 5 $20 bills, 3 $10 bills, 7 $5 bills, 27 $1 bills, and a certain amount of change in coins. If he is supposed to leave $300 in notes as well as all the coins in the till and turn the rest in to the main office, how much money will he be handing in?


The total earnings for the paper cover version were $0.20 x 32 000 = $6,400. So, the author earned $6,400 x 6 / 100 = $384 from the paper cover version. The total earnings for the hardcover version were $0.40 x 15,000 = $6,000. So, the author earned $6,000 x 12 / 100 = $720 from the hardcover version. Therefore, the author earned a total of $384 + $720 = $1104.
The answer: 1104
Reverse engineering the question: An author of a book got 6% of the total sales of the paper cover version of his books and 12% of the total sales of the hardcover version. If 32,000 copies of the paper cover version were sold at $0.20 each and 15,000 copies of the hardcover version were sold at $0.40 each, how much did the author earn?


Reasoning and answer: In the first movie series with 12 seasons, after the mechanical failure, the number of episodes that Corey lost is 2 * 12 = 24. Originally, the movie series with 12 seasons had 12 * 16 = 192 episodes. After the mechanical failure, Corey had 192 - 24 = 168 episodes remaining in the first movie series. Similarly, the 14 season movie series also had 14 * 2 = 28 lost after the computer's mechanical failure. Originally, the movie series with 14 seasons has 14 * 16 = 224 episodes. The mechanical failure of the computer reduced the number of episodes in the 14 season movie series to 224 - 28 = 196. After the loss, Corey had 196 + 168 = 364 episodes remaining from the two movie series he had downloaded.
The answer: 364
What was the question?
Question: Corey downloaded two movie series from his Netflix account with 12 and 14 seasons per series, respectively. However, in the week, his computer got a mechanical failure, and he lost two episodes from each season for both series. If each season in the movie series that Corey downloaded had 16 episodes, how many episodes remained after the computer's mechanical failure?


Reasoning and answer: Age 5 years ago: 17 - 5 = 12. Sister's age 5 years ago: 35 - 12 = 23. Sister's age today: 23 + 5 = 28 years. Djibo's sister is 28 years old today.
The answer: 28
What was the question?
Question:
Djibo is 17 years old. Five years ago Djibo added his age with his sister's age and the sum was 35. How many years old is Djibo's sister today?