[Question]With 82 students, there are 2 students for each computer. If there are 16 more students, how many computers must they have in total to continue with 2 students per computer?
[Answer]2 students per computer means the total number of computers is 82 / 2 = 41 computers. with the arrival of 16 students, the number of computers that should be added is 16 / 2 = 8 computers. all computers together are 41 + 8 = 49 computers. The answer is 49.
Q: Five years ago, there were 500 old books in the library. Two years ago, the librarian bought 300 books. Last year, the librarian bought 100 more books than she had bought the previous year. This year, the librarian donated 200 of the library's old books. How many books are in the library now?
A: Last year the librarian bought 300 + 100 = 400 books. Thus, there were 500 + 300 + 400 = 1200 books as of last year. Therefore, there are 1200 - 200 = 1000 books now in the library. The answer is 1000.
Question: Janna sleeps 7 hours each day during weekdays and 8 hours each day during weekends. How many hours does she sleep in a week?
Answer: She sleeps 7 * 5 = 35 hours on weekdays. She sleeps 8 * 2 = 16 hours on weekends. 35 + 16 = 51 hours is the amount of time she sleeps in a week. The answer is 51.
[Question]In a 60-item exam, Liza got 90% of the items correctly. Her best friend, Rose, got 2 more correct answers than her. How many incorrect answers did Rose have?
[Answer]Liza got 60 x 90 / 100 = 54 of the items correctly. So, Rose got 54 + 2 = 56 of the items correctly. Thus, Rose had 60 - 56 = 4 incorrect answers. The answer is 4.
Q: 8 years ago James was twice Janet's age. In 15 years James will turn 37. Susan was born when Janet turned 3. How old will Susan turn in 5 years?
A: James is 37 - 15 = 22 years old. So 8 years ago he was 22 - 8 = 14 years old. That means Janet was 14 / 2 = 7 years old 8 years ago. So Janet is now 7 + 8 = 15 years old. That means Susan is 15 - 3 = 12 years old. So in 5 years she will be 12 + 5 = 17 years old. The answer is 17.
Question: Alexa has a lemonade stand where she sells lemonade for $2 for one cup. If she spent $20 on ingredients, how many cups of lemonade does she need to sell to make a profit of $80?
Answer:
To make a profit of $80, she needs to make $80 + $20 = $100. She needs to sell $100 / $2 = 50 cups of lemonade. The answer is 50.