Question: Adam has just bought some new books so he has decided to clean up his bookcase. After he adds his new books to his bookshelf he realizes that he has bought enough books to finish completely filling his bookcase with 2 books left over. Before his shopping trip, Adam had 56 books in his bookcase. If his bookcase has 4 shelves and averages 20 books per shelf, how many books did Adam buy on his shopping trip?
Answer: Adam’s bookshelf has 4 shelves that fit 20 books each, which is 4 * 20 = 80 books in total to fill the bookshelf. Adam ended the day with a full bookcase of 80 books in the bookcase and 2 books left over, 80 + 2 = 82 books total. If Adam started the day with 56 books and ended the day with 82 books then Adam bought 82 - 56 = 26 books bought on his shopping trip. The answer is 26.

Question: Michael was watching a TV show, which was aired for 1.5 hours. During this time, there were 3 commercials, which lasted 10 minutes each. How long (in hours) was the TV show itself, not counting commercials?
Answer: Each commercial lasted 10 minutes, so three commercials lasted 3 * 10 = 30 minutes. The show was aired for 1.5 hours, and 30 minutes is 0.5 of an hour, so without the commercials, the show was 1.5 - 0.5 = 1 hour long. The answer is 1.

Question: Alex has not washed his clothes for a month; 18 shirts, 12 pants, 17 sweaters, and 13 jeans are waiting to be washed. Alex's washing machine can wash a maximum of 15 items per cycle. Each cycle takes 45 minutes. How many hours will it take the washing machine to wash all the clothes?
Answer: Alex will wash 18 + 12 + 17 + 13 = 60 items. With 20 items per wash cycle, Alex will wash the clothes in 60 / 15 = 4 cycles. With 45 minutes per cycle, the washing machine will take 45 * 4 = 180 minutes to wash the clothes. As 1 hour has 60 minutes, the washing machine will take 180 / 60 = 3 hours to wash the clothes. The answer is 3.

Question: Six Grade 4 sections launched a recycling drive where they collect old newspapers to recycle. Each section collected 280 kilos in two weeks. After the third week, they found that they need 320 kilos more to reach their target. How many kilos of the newspaper is their target?
Answer:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
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In a week, each section collected 280 / 2 = 140 kilos of newspapers. So, in three weeks, one section collected 140 x 3 = 420 kilos. So, the four sections collected a total of 420 x 4 = 1680 kilos. Hence, their target is to collect 1680 + 320 = 2000 kilos of the newspaper. The answer is 2000.