Question: A firefighter is paid $30 per hour for a 48-hour workweek. He pays 1/3 of the money on rent and $500 on food and $1000 on taxes per month. Calculate the total amount of money the firefighter has after paying his monthly expenses.
Answer: The firefighter earns $30 / hour * 48 hours / week = $1440 in a week. In a month, the firefighter earns $1440 / week * 4 weeks / month = $5760. His total monthly payment is 1 / 3 * $5760 = $1920. His total monthly expenses are $1920 for rent + $500 for food + $1000 for taxes = $3420. The total amount of money the firefighter has after his expenses is $5760 - $3420 = $2340. The answer is 2340.

Question: For many years, the number of sharks in Pelican Bay has been twice the number of Pelicans in Shark Bite Cove.  But today scientists say one-third of the Pelicans in Shark Bite Cove have moved to Pelican Bay. If there are still 60 sharks in Pelican Bay, how many Pelicans remain in Shark Bite Cove?
Answer: If there are 60 sharks in Pelican Bay, and this number is twice the number of Pelicans that usually live in Shark Bite Cove, then there were 60 / 2 = 30 Pelicans in Shark Bite Cove. If one - third of the Pelicans in Shark Bite Cove move to Pelican Bay,. then 30 / 3 = 10 Pelicans will have moved away. This would leave 30 - 10 = 20 Pelican remaining in Shark Bite Cove. The answer is 20.

Question: A bicycle shop owner adds 3 bikes to her stock every week. After 1 month, she had sold 18 bikes but still had 45 bikes in stock. How many bikes did she have originally?
Answer: There are approximately 4 weeks in a month. The shop owner added 3 bikes every week for 4 weeks for a total addition of 3 * 4 = 12 bikes. The shop owner now has the original number of bikes + 12 bikes. She sold 18 bikes within the same time frame. She now has a total of 45 bikes which is: the original number of bikes + 12 - 18 = 45 bikes. The original number of bikes = 45 - 12 + 18 = 51 bikes. The answer is 51.

Question: Mrs. Carlton gives out penalty points whenever her students misbehave. They get 5 points for interrupting, 10 points for insulting their classmates, and 25 points for throwing things. If they get 100 points, they have to go to the office. Jerry already interrupted twice and insulted his classmates 4 times. How many times can he throw things before he gets sent to the office?
Answer:
For interrupting, Jerry got 5 points per interruption * 2 interruptions = 10 points. For insulting, he got 10 points per insult * 4 insults = 40 points. To get to the 100 limit points, Jerry has 100 points - 10 points - 40 points = 50 points left. He still has 50 points / 25 points per throw = 2 throws. The answer is 2.