[Question]Officer Hopps has to give out 200 tickets in May. The first 15 days he averages 8 tickets a day. How many does he have to average each day for the rest of the month to reach his required goal?
[Answer]He has given out 120 tickets because 15 x 8 = 120. He has 16 days left to had out tickets because 31 - 15 = 16. He has to give out 80 more because 200 - 120 = 80. He has to give out 5 a day because 80 / 16 = 5. The answer is 5.

[Question]Trey is hanging wall decorations around his house. He uses a nail for each of two-thirds of them, a thumbtack for each of two-fifths of the rest, and a sticky strip for each of the other decorations. He used 15 sticky strips. How many nails did Trey use?
[Answer]Trey used 15 sticky strips for 3 / 5 of the remaining decorations after using nails, so he used 15 *  / 3 / 5 = 25 thumbtacks and sticky strips. The 25 decorations were 1 / 3 of the total decorations, so he used 25 / 1 / 3 = 75 total decorations. The nails were 2 / 3 of the decorations, so Trey used 75 decorations * 2 / 3 = 50 nails. The answer is 50.

[Question]Malcolm brushes his teeth for 2 minutes after breakfast, lunch and dinner. After 30 days, how many hours does he spend brushing his teeth?
[Answer]He brushes his teeth 3 times a day, after breakfast, lunch and dinner. He brushes for 2 minutes so that’s 3 * 2 = 6 minutes per day. He brushes 6 minutes per day so after 30 days he has brushed 6 * 30 = 180 minutes. There are 60 minutes in 1 hour and he brushes for 180 minutes so that’s 180 / 60 = 3 hours. The answer is 3.

[Question]John decided to start rowing around a square lake. Each side of the lake is 15 miles. Jake can row at twice the speed he can swim. It takes him 20 minutes to swim 1 mile. How long, in hours, does it take to row the lake?
[Answer]
The perimeter of the lake is 4 * 15 = 60 miles. He swims at a speed of 60 / 20 = 3 mph. So he rows at a speed of 3 * 2 = 6 mph. That means it takes him 60 / 6 = 10 hours to row around the lake. The answer is 10.