Question: James buys 100 tennis balls and gives half of them away. The other half he puts into 5 large containers. How many tennis balls go in each container?
Answer: He keeps 100 / 2 = 50 tennis balls. So 50 / 5 = 10 go in each container. The answer is 10.

Question: Jeff plays tennis for 2 hours. He scores a point every 5 minutes. He wins a match when he scores 8 points. How many games did he win?
Answer: He played for 2 * 60 = 120 minutes. So he scores 120 / 5 = 24 points. That means he won 24 / 8 = 3 games. The answer is 3.

Question: Matt rode his bike away from the house, he rode a total of 1000 feet. Along the way, he passed a stop sign that was 350 feet away from his house. He continued his ride and passed a second sign. After passing the second sign he road an additional 275 feet. How many feet are between the first and second signs?
Answer: Matthew rode 350 feet to the first sign, so there are 1000 - 350 = 650 feet between the first sign and the end. After passing the second sign Matthew road 275, so 650 - 275 = 375 feet remain. The answer is 375.

Question: A mosquito sucks 20 drops of blood every time it feeds on someone. If there are 5000 drops per liter and you have to lose 3 liters of blood to die, how many mosquitoes would have to feed on you to kill you?
Answer:
First find the total number of liters a mosquito sucks in one feeding: 20 drops / 5000 drops / liter = .004 L / feeding. Then divide the lethal amount of blood by the amount of blood one mosquito can drain: 3 L / .004 L / feeding = 750 feedings. The answer is 750.