Question: It takes 10 minutes to wash a car, 15 minutes to change oil, and 30 minutes to change a set of tires. If mike washes 9 cars, changes the oil on 6 cars, and changes two sets of tires how many hours did he work?
Answer: He spent 10 minutes * 9 cars = 90 minutes washing cars. He spent another 15 minutes * 6 cars = 90 minutes changing oil. He spent 2 cars * 30 minutes = 60 minutes changing tires. He spent 90 minutes + 90 minutes + 60 minutes = 240 minutes working. He spent 240 minutes / 60 minutes = 4 hours working. The answer is 4.
[Question]Kate loves painting. She decided to go to an Art-museum in her city. The entrance fee is $5. Kate loved the visit so much, that she decided to go there once a month. After 1 year, the ticket price increased to $7 and Kate decided she is going to visit the museum only 4 times a year. How much did Kate pay for all visits to the Art-museum after 3 years of visiting?
[Answer]One year is 12 months, so during the first year, Kate spent $5 / month * 12 months / year = $60 / year on the tickets. After that, she went to the museum for 3 years - 1 year = 2 more years. During this time, she visited the museum 2 years * 4 visits / year = 8 visits. She had to pay the higher price of $7, so she spent $7 / visit * 8 visits = $56 in two last years. In total Kate paid $56 + $60 = $116 during 3 years. The answer is 116.
Q: To earn an airplane pilot certificate, Sangita is required to fly 1,500 hours. She has already completed 50 hours of day flying, 9 hours of night flying, and 121 hours flying cross-country. To meet her goal in exactly 6 months, how many hours per month must Sangita fly?
A: Sangita has already flown for a total of 50 hours + 9 hours + 121 hours = 180 hours. The flight time she has remaining is 1500 hours - 180 hours = 1320 hours. Sangita's monthly target must therefore be 1320 hours / 6 months = 220 hours / month. The answer is 220.
Question: Renne earns $4000 per month and wants to save half of her monthly earnings to buy the vehicle of her dreams worth $16000. How many months of saving will it take her to buy the vehicle?
Answer: If she's saving half her salary every month, she saves 1 / 2 * $4000 = $2000 every month. If the vehicle is worth $16000, and she saves $2000 every month to buy it, she will have to save for 16000 / 2000 = 8 months. The answer is 8.
[Question]The sum of the ages of three boys is 29. If two of the boys are the same age and the third boy is 11 years old, how old are the other two boys?
[Answer]The third boy is 11 so the sum of the ages of the first two is 29 - 11 = 18. The ages of the first two boys are equal so each of them is 18 / 2 = 9 years. The answer is 9.
[Question]Five less than three times the number of Doberman puppies plus the difference between the number of Doberman puppies and the number of Schnauzers is equal to 90. If the number of Doberman puppies is 20, how many Schnauzers are there?
[Answer]
Three times the number of Doberman puppies is 3 * 20 = 60. Five less than three times the number of Doberman puppies is 60 - 5 = 55. Let's say the number of Schnauzers is s. The difference between the number of Doberman puppies and the number of Schnauzers is s - 20. Five less than three times the number of Doberman puppies plus the difference between the number of Doberman puppies and the number of Schnauzers is equal to 90, meaning 55 + s - 20 = 90. The number of Schnauzers which is s + 55 - 20 = 90. This evaluates to s + 35 = 90. There are s = 55 Schnauzers. The answer is 55.