Answer this question:Mary's sheep can run 12 feet per second, and her sheepdog can run 20 feet per second. A sheep standing 160 feet away from the sheep dog bolts, and the dog runs after it. How many seconds does it take the dog to catch the sheep?
First find how much faster the dog is than the sheep: 20 feet / second - 12 feet / second = 8 feet / second. Then divide the distance the dog needs to run by the speed difference: 160 feet / 8 feet / second = 20 seconds.
The answer is 20.

Answer this question:James spends 10 minutes downloading a game, half as long installing it, and triple that combined amount of time going through the tutorial. How long does it take before he can play the main game?
First divide the download time in half to find the install time: 10 minutes / 2 = 5 minutes. Then add that amount of time to the download time: 5 minutes + 10 minutes = 15 minutes. Then triple that amount of time to find the tutorial time: 15 minutes * 3 = 45 minutes. Then add that time to the install and downtime time to find the total time: 45 minutes + 15 minutes = 60 minutes.
The answer is 60.

Answer this question:Rachel weighs 75 pounds, 6 pounds less than Jimmy and 15 pounds more than Adam. What is the average weight of the three people, in pounds?
Jimmy weighs 75 + 6 = 81 pounds. Adam's weight is 75 - 15 = 60 pounds. In total, the three weigh 75 + 81 + 60 = 216 pounds. The average weight of the three is 216 / 3 = 72 pounds.
The answer is 72.

Answer this question:Reggie and his brother are having a basketball shooting contest. They each get to take 10 shots. Layups are worth 1 point, free throws are worth 2 points, and anything further away is worth 3 points. Reggie makes 3 layups, two free throws, and one long shot. His brother only shoots long shots and makes 4 of them. How many points does Reggie lose by?
Reggie makes 3 points off layups because 3 x 1 = 3. Reggie makes 4 points off free - throws because 2 x 2 = 4. Reggie makes 3 points off long shots because 1 x 3 = 3. Reggie scores 10 points because 3 + 4 + 3 = 10. His brother scores 12 points because 4 x 3 = 12. Reggie loses by 2 because 12 - 10 = 2.
The answer is 2.