There are 23 * 4 = 92 seats on this bus. After the first stop, there are 16 + 15 - 3 = 28 people on the bus. After the 2nd stop, there are 28 + 17 - 10 = 35 people on the bus. So there are 92 - 35 = 57 empty seats on the bus after the 2nd stop.
The answer: 57
Reverse engineering the question: The seats of a bus are arranged in 23 rows of 4 seats. At the start, 16 people climb. At the first stop, 15 people board the bus and 3 get off. At the second stop, 17 people get on the bus and 10 get off. How many empty seats are there after the second stop?


Reasoning and answer: If Ann has 60 cards, which is six times as many cards as Heike, Heike has 60 / 6 = 10 cards. Anton has three times as many cards in his collection as Heike does, and since Heike has 10 cards, Anton has 10 * 3 = 30 cards. Ann has 60 - 30 = 30 more cards than Anton.
The answer: 30
What was the question?
Question: Anton has three times as many cards in his collection as Heike does. Ann has six times as many cards as Heike does. If Ann has 60 cards, how many more cards does Ann have more than Anton?


Juvy planted 3 + 2 = 5 rows with parsley and rosemary. So, 20 - 5 = 15 rows will be planted with chives. Therefore, 15 x 10 = 150 chives will be planted.
The answer: 150
Reverse engineering the question: Juvy has a garden that has 20 rows with 10 plants in each row. She plants parsley in the first 3 rows and rosemary in the last two rows. The rest of the rows will be planted with chives. How many chives will Juvy plant?


Reasoning and answer: Ali has 7 * $5 = $35 from the seven 5 - dollar bills. So in total, he has $35 + $10 = $45.
The answer: 45
What was the question?
Question: Ali keeps his bills in his wallet. He has 7 bills of 5 dollars and 1 bill of 10 dollars. How much money does he have in total?


Austin has 60 / 3 = 20 markers. Alia has 20 * 2 = 40 markers.
The answer: 40
Reverse engineering the question: Alia has 2 times as many markers as Austin. Austin has one-third as many markers as Steve does. If Steve has 60 markers, how many does Alia have?


Two boxes of crayons have 24 x 5 / 8 = 15 unused crayons from each box. So, a total of 15 x 2 = 30 unused crayons are in the two boxes. For the other 2 boxes, there are 24 x 2 / 3 = 16 used crayons from each box. Hence, there are 24 - 16 = 8 unused crayons. So, a total of 8 x 2 = 16 unused crayons are in the other two boxes. Therefore, Madeline has a total of 30 + 16 + 24 = 70 unused crayons.
The answer: 70
Reverse engineering the question:
Madeline has 5 boxes with 24 crayons in each. She noticed that 5/8 of the crayons in the 2 boxes were not yet used. In the 2 other boxes, only 2/3 of the crayons were used while the last box was not entirely used. How many unused crayons did Madeline have?