There are 10 students in Liam's art class and 1 / 2 of them make a different amount of artworks than the other half, 1 / 2 x 10 = 5 students. 5 students make 3 artworks each, 5 x 3 = 15 artworks. The other 5 students make 4 artworks each, 5 x 4 = 20 artworks. Combined, the students in the class make 15 + 20 = 35 artworks.
The answer: 35
Reverse engineering the question: Liam is teaching art to a group of 10 students. He has 20 art kits that he hands out to the students to share, 1 art kit for 2 students. From those art kits half the students make 3 artworks each and half the students make 4 artworks each. How many artistic works does the whole class create?

The cassette tapes will cost 2 × 9 = $18. She spends 18 + 25 = $43 in total. Josie will have 50 - 43 = $7 left.
The answer: 7
Reverse engineering the question: Josie received $50 as a gift. She plans to buy two cassette tapes that cost $9 each and a headphone set that costs $25. How much money will she have left?

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?

Since November has 30 days, the town received 4 inches of rain for the first half of the month for 30 / 2 = 15 days. The total inches of rain that the town received for the 15 days is 15 * 4 = 60 inches. The rain falling in the town increased by 2 * 4 = 8 inches per day for the remaining half of the month. Therefore, for the rest of the month, the town received 8 * 15 = 120 inches of rain. The total amount of rain the town received in November is 120 + 60 = 180 inches.
The answer: 180
Reverse engineering the question:
In a northwestern town, it rained 4 inches per day during the first 15 days of November. For the remainder of the month, the average daily rainfall was twice the amount observed during the first 15 days. What is the total amount of rainfall for this town in November, in inches?