Question: The school is having a book-a-thon. The winning class gets a pizza party. The fifth grade has 20 students and one week to read as much as possible. The 6th grade already finished and read a total of 299 hours. How many hours does each student in 5th grade need to average per day to beat them by 1?
Answer with step-by-step thinking: The class needs to read 300 hours in a week because 299 + 1 = 300. The class needs to read 60 hours a day because 300 / 5 = 60. Each student needs to read 3 hours a day because 60 / 20 = 3.
So the answer is 3.


Question: An ice cream vendor has 50 chocolate-flavored ice creams and 54 mango-flavored ice creams in his cart. If he sold 3/5 of the chocolate-flavored ice creams and 2/3 of the mango-flavored ice creams, how many total ice creams were not sold?
Answer with step-by-step thinking: There were a total of 50 + 54 = 104 ice creams. There were 50 x 3 / 5 = 30 chocolate - flavored ice creams sold. There were 54 x 2 / 3 = 36 mango - flavored ice creams sold. A total of 30 + 36 = 66 ice creams were sold. So, 104 - 66 = 38 ice creams were not sold.
So the answer is 38.


Question: Richard can clean his room in 22 minutes. Cory takes 3 minutes more than Richard to clean her room while Blake can clean his room 4 minutes more quickly than Cory. If they have to clean their rooms twice a week, how many minutes do all three spend cleaning their rooms each week?
Answer with step-by-step thinking:
Cory takes 22 + 3 = 25 minutes to clean her room. Blake takes 25 - 4 = 21 minutes to clean his room. The three of them can clean their room in 22 + 25 + 21 = 68 minutes in all. In a week, they spend 68 x 2 = 136 minutes cleaning their rooms.
So the answer is 136.