Nalani had two female dogs that were expecting and after a month gave birth to 10 puppies each. She then sold 3/4 of the puppies after they came of age, each at $200. Calculate the total amount of money she received from the sale of the puppies.
Let's think: If the two expectant dogs gave birth to 10 puppies each, the total number of puppies Nalani had is 10 + 10 = 20. When they came of age, Nalani sold 3 / 4 of the dogs, a total of 3 / 4 * 20 = 15 dogs. If each dog sold for $200, Nalani received 15 * 200 = $3000 from the sale of the dogs.. The answer is: 3000.

A TV show has been going on for 14 years. Out of those 14 years, 8 seasons had 15 episodes, 4 seasons had 20 episodes, and 2 seasons had 12 episodes. What is the average number of episodes per year?
Let's think: 8 seasons with 15 episodes had 8 x 15 = 120 episodes. 4 seasons with 20 episodes had 4 x 20 = 80 episodes. 2 seasons with 12 episodes had 2 x 12 = 24 episodes. All together, there have been 120 + 80 + 24 = 224 episodes. The average number of episodes a year is 224 / 14 = 16 episodes.. The answer is: 16.

There are 32 students in a statistics course. 25 percent of the class received an A. 1/4 of the remaining students got either a B or C, and the rest of the students failed. How many students failed?
Let's think: A grade:32(.25) = 8. 32 - 8 = 24 students remaining. B / C grade:24 / 4 = 6. 24 - 6 = 18 students fail.. The answer is: 18.

Jack, who weighs 60 pounds, wants to play on the see-saw with his cousin Anna, who weighs 40 pounds. How many 4-pound rocks does Jack need to hold to make their weights equal?
Let's think:
First find the total difference in weight between the two people: 60 pounds - 40 pounds = 20 pounds. Then divide the weight difference by the weight of each rock to find the number of rocks need to even the weights: 20 pounds / 4 pound / rock = 5 rocks.. The answer is: 5.