First find the total number of days in 6 weeks: 6 weeks * 7 days / week = 42 days. Then find the total difference in the number of pages Janet and Belinda read each day: 80 pages / day - 30 pages / day = 50 pages / day. Then multiply the daily difference by the number of days to find the total difference in the number of pages they read: 50 pages / day * 42 days = 2100 pages.
The answer: 2100
Reverse engineering the question: If Janet reads 80 pages a day and Belinda reads 30 pages a day, how many more pages does Janet read in 6 weeks?


Reasoning and answer: She planted eight trees. This means she used half of that amount of apples, which is 8 trees / 2 trees / apple = 4 apples. That means that she planted four of the six apples she bought, leaving only 6 apples - 4 apples = 2 apples to be eaten.
The answer: 2
What was the question?
Question: Mary bought six apples from the store. From the apples she bought, for each that Mary ate, she planted two trees from the remaining ones. How many apples did Mary eat?


The second warehouse has 400 / 2 = 200 boxes. Collectively, there are 400 + 200 = 600 boxes in the first and second warehouse.
The answer: 600
Reverse engineering the question: There are two warehouses. The first warehouse has twice as many boxes as the second warehouse. If the first warehouse has 400 boxes, how many boxes are there in both warehouses combined?


Reasoning and answer: Mildred and Candice spent $25 + $35 = $60 in total. Therefore, they were left with $100 - $60 = $40 after spending.
The answer: 40
What was the question?
Question: Mildred and Candice went to the market. Mildred spent $25 while Candice spent $35. If their mom gave them $100 to spend, how much will be left with them after spending?


The total cost of the ball, the shorts, and the shoes is $3.75 + $2.40 + $11.85 = $18. Zachary needs $18 − $10 = $8 more.
The answer: 8
Reverse engineering the question: For football season, Zachary wants to buy a new football, a pair of shorts, and a pair of football shoes. The ball costs $3.75, the shorts cost $2.40, and the shoes cost $11.85. Zachary has $10. How much more money does Zachary need?


In class A, there are 40 / 100 * 80 = 32 students. In class B, the number of students is less by 21, which means class B has 32 - 21 = 11 students. That means 80 - 32 - 11 = 37 students are in class C.
The answer: 37
Reverse engineering the question:
Adam goes to a small school, which teaches 80 students in three classes. 40% of the students are in class A, and class B has 21 students fewer than class A. The rest are in class C. How many students are in this class?