Question: The library has 9,900 books. Over the summer, they sold some books. If only four sixths of the books are left, how many did they sell?
Answer: A sixth of the books is 9900 / 6 = 1650 books. Only 4 * 1650 = 6600 books are left. The library sold 9900 - 6600 = 3300 books over the summer. The answer is 3300.
[Question]At a coffee shop, 7 customers order coffee at $5 each and 8 customers order tea at $4 each. How much money did the coffee shop make?
[Answer]Sale from coffee is 7 x $5 = $35. Sale from tea is 8 x $4 = $32. Total sales is $35 + $32 = $67. The answer is 67.
Q: Sally bought 3 photograph frames, each costing her $3. She paid with a $20 bill. How much change did she get?
A: She bought the frames for 3 $3 = $9. Sally got $20 - $9 = $11 in change. The answer is 11.
Question: Austin and Jake start descending from the 9th floor of a building at the same time. Austin uses the elevator and Jake uses the stairs, descending 3 steps every second. The stairs have 30 steps across each floor. If the elevator will take a minute to get to ground level, how many seconds later will Jake get to the ground floor?
Answer: Jake has to descend 30 steps on 9 floors for a total of 9 * 30 = 270 steps. He descends 3 steps every second so he will descend 270 steps in 270 / 3 = 90 seconds. Austin will get down after only a minute (60 seconds) so Jake will get down 90 - 60 = 30 seconds later. The answer is 30.
[Question]In a guessing game, Hajar's score is 24 points. The difference in the scores between Hajar and Farah's score in the game is 21. What is the sum of their scores, assuming Farah's score is higher than Hajar's?
[Answer]If the difference in scores between Farah and Hajar in the game is 21 points, and Hajar's score is 24, then Farah has a score of 21 + 24 = 45 points. The overall score in the game is 45 + 24 = 69. The answer is 69.
[Question]Joey studies for his SAT exams 2 hours per night 5 nights a week. On the weekends, he studies 3 hours a day. If his SAT exam is 6 weeks away, how much time will Joey spend studying?
[Answer]
Joey studies 2 hours a night 5 nights a week so that's 2 * 5 = 10 hours. He studies 3 hours a day on the weekends so that's 3 * 2 = 6 hours. In one week, Joey studies 10 + 6 = 16 hours. He has 6 weeks till his exams and he studies for 16 hours a week so that's 6 * 16 = 96 hours of studying. The answer is 96.