Q: Dr. Harry wants to know how many candies Susan consumed during the week. Susan tells him she bought 3 on Tuesday, 5 on Thursday, 2 on Friday. If she has only 4 of them left, how many did she eat?
A: She had bought 3 + 5 + 2 = 10 candies over the week. She has only 4 left which means she ate 10 - 4 = 6 candies during the week. The answer is 6.

Q: Percy swims 1 hour before school and 1 after school 5 days a week. He swims 3 hours on the weekend. How many hours of swimming does he do over 4 weeks?
A: He swims 1 hour before and after school for a total of 1 + 1 = 2 hours. He swims 2 hours a day for 5 days for a total of 2 * 5 = 10 hours. He also swims an additional 3 hours on the weekend so 10 + 3 = 13 hours. Over a course of 4 weeks, at 13 hours per week, he swims 4 * 13 = 52 hours. The answer is 52.

Q: 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?
A:
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.