Q: A class has 500 tables and 2/5 times as many books as the number of tables in the class are on top of each table. What's the total number of books in the class?
A: If there are 2 / 5 times as many books as the number of tables in the class on top of each table, there are 2 / 5 * 500 = 200 books. Since the class has 500 tables with 200 books on top of each, there are 500 * 200 = 100000 books. The answer is 100000.
Question: Diana earned $150 in July. She earned 3 times this amount in August. In September, She earned twice the money she earned in August. How much money did Diana earn over these three months?
Answer: The amount of money Diana earned in August is 3 * $150 = $450. The amount of money Diana earned in September is 2 * $450 = $900. The total amount of money Diana earned over the three months is $150 + $450 + $900 = $1500. The answer is 1500.
[Question]At school today, Charlize was 20 minutes late. Four of her classmates were each ten minutes late than she was. What's the total time for which the five students were late?
[Answer]If Charlize was 20 minutes late, each of her friends was 20 + 10 = 30 minutes late. The total time for which Charlize's friends were late was 4 * 30 = 120 minutes. Together with Charlize, the three friends were 120 + 20 = 140 minutes late. The answer is 140.
Q: Edmonton is 220 kilometers north of Red Deer. Calgary is 110 kilometers south of Red Deer. If you travel at 110 kilometers per hour, how long will it take to get from Edmonton to Calgary?
A: Total distance travelled is 220km + 110km = 330 km. Time to travel that far is 330km / 110km / hour = 3 hours. The answer is 3.
Question: A school is getting ready to open for the year and the sports class is organizing the equipment they have been donated. In total, they have 300 donations to organize. 60 of these were basketball hoops, half of which also had basketballs included as part of the donation. 120 pool floats were donated, but a quarter of these were damaged and were discarded before the sports class arrived. There were 50 footballs, 40 tennis balls, and the remaining donations were basketballs. In total, how many basketballs have been donated?
Answer: Some of the pool floats were damaged, which means that 120 / 4 = 30 pool floats were discarded. This left the class with 120 30 = 90 pool floats that were actually part of the donations they need to organize. This means there were a total of 60 basketball hoops + 90 pool floats + 50 footballs + 40 tennis balls = 240 donations that were not basketballs. So out of the donations, there were 300 donations 240 = 60 basketballs. In addition, half of the basketball hoops were donated with a basketball included which amounts to 60 basketball hoops / 2 = 30 basketballs. There was therefore a total of 60 + 30 = 90 basketballs donated. The answer is 90.
Q: A water tower that serves four neighborhoods around it holds 1200 barrels of water and is filled to the top each week. If one neighborhood uses 150 barrels of water in a week, the second neighborhood uses twice as many barrels of water as the first neighborhood in a week, and the third neighborhood uses one hundred more barrels of water than the second neighborhood in a week, how many barrels are left for the fourth neighborhood?
A:
The second neighborhood uses 150 * 2 = 300 barrels of water. The third neighborhood uses 300 + 100 = 400 barrels of water. The first, second, and third neighborhoods together use 150 + 300 + 400 = 850 barrels of water. Thus, the fourth neighborhood has 1200 - 850 = 350 barrels of water left for it to use. The answer is 350.