Q: Oliver owns a laundry shop, and he charges $2 per kilo of laundry. Two days ago, his shop washed a total of 5 kilos of laundries. Yesterday, it washed five kilos of laundries more than the previous day. Today, it washed twice the number of kilos than yesterday.  How much did he earn for three days?
A: Yesterday, his shop washed 5 + 5 = 10 kilos of laundry. Today, it washed 2 x 10 = 20 kilos of laundry. Thus, Oliver's shop washed a total of 5 + 10 + 20 = 35 kilos of laundries for three days. Therefore, his shop earned 35 x $2 = $70 for three days. The answer is 70.
Question: Paul made two bank transfers of $90 and $60 respectively. A service charge of 2% was added to each transaction. If the second transaction was reversed (without the service charge), what is his account balance now if it was $400 before he made any of the transfers?
Answer: 2% of $90 is (2 / 100) * $90 = $1.8. 2% of $60 is (2 / 100) * $60 = $1.2. The second transaction was reversed without the service charge so only a total of $90 + $1.8 + $1.2 = $93 was deducted from his account. He will have a balance of $400 - $93 = $307. The answer is 307.
[Question]A school does a yearly tree planting activity. This year, the 4th graders planted a total of 30 trees while 5th graders planted twice as many. The 6th graders planted 30 fewer than thrice the number of trees planted by the 5th graders. How many trees did they plant altogether?
[Answer]The 5th graders planted 30 x 2 = 60 trees. Thrice the number of trees planted by the 5th graders is 60 x 3 = 180. So, the 6th graders planted 180 - 30 = 150 trees. Therefore, they planted a total of 30 + 60 + 150 = 240 trees. The answer is 240.
Q: In a show, there can be 5 actors at a time. Every actor is in the show for about 15 minutes, and then another 5 actors come in. How many actors can there be on the show in 1 hour?
A: One hour is 60 minutes, so there can be 60 / 15 = 4 different sets of actors. This means, that during one hour there can be 4 * 5 = 20 different actors in the show. The answer is 20.
Question: Jeremy bought a computer for $3000, and some accessories for 10% of the price of the computer. How much money has Jeremy if, before the purchase, he had two times more money, than the cost of the computer itself?
Answer: At the start, Jeremy had two times more money than the price of the computer, which means he had 2 * 3000 = $6000. The cost of the accessories stands at 3000 * 1 / 10 = $300. This leaves Jeremy with 6000 - 3000 - 300 = $2700. The answer is 2700.
Q: Selena reads a book with 400 pages. Harry reads a book with 20 fewer than half the number of pages Selena's book has. How many pages are in the book of Harry?
A:
Half the number of pages of Selena is 400 / 2 = 200. Therefore, Harry's book has 200 - 20 = 180 pages. The answer is 180.