Answer the following question.
In the post-apocalyptic wasteland, 1 lizard is worth 8 bottle caps, 3 lizards are worth 5 gallons of water, and 1 horse is worth 80 gallons of water. Marla can scavenge for 20 bottle caps each day, but needs to pay 4 bottle caps per night for food and shelter. How many days does it take Marla to collect all the bottlecaps she needs to buy a horse?
Step-by-step reasoning process: First find how many lizards you get for one gallon of water: 3 lizards / 5 gallons = .6 lizards / gallon. Then figure out how many lizards 80 gallons of water is worth: 80 gallons * .6 lizards / gallon = 48 lizards. Then figure out how many bottle caps 48 lizards is worth: 48 lizards * 8 bottle caps / lizard = 384 bottle caps. Then figure out how many bottle caps Marla can save each day by subtracting the number she spends from the number she finds: 20 bottlecaps / day - 4 bottlecaps / day = 16 bottlecaps / day. Finally, divide the number of bottle caps Marla needs by the number she saves each day: 384 bottle caps / 16 bottle caps / day = 24 days.
The answer is 24.

Answer the following question.
A soccer team has 24 players. They have scored 150 goals on the season. There have been 15 games played. 1/3 of the players have averaged 1 goal each per game. How many total goals have the other players scored?
Step-by-step reasoning process: 8 players have averaged 1 goal a game because 24 x (1 / 3) = 8. These players average a total of 8 goals a game because 8 x 1 = 8. These players have scored 120 goals because 8 x 15 = 120. The remaining players have scored 30 total goals because 150 - 120 = 30.
The answer is 30.

Answer the following question.
Ten percent less than twice the total number of students present in the science class yesterday have attended class today. If there were 70 students in the class yesterday and 30 students are absent today, calculate the number of students registered for the course.
Step-by-step reasoning process: Twice the number of students present in the science class yesterday is 70 * 2 = 140. Ten percent less than twice the number of students present in the class yesterday means there are 10 / 100 * 140 = 14 fewer students than twice the number present yesterday. The number of students present in the science class today is 140 - 14 = 126. If the total number of registered students for the course who are absent today is 30, a full class of the science course has 126 + 30 = 156 students.
The answer is 156.

Answer the following question.
Jim has 2 rows of 4 trees to start. When he turns 10 he decides to plant a new row of trees every year on his birthday. On his 15th birthday after he doubles the number of trees he has. How many trees does he have?
Step-by-step reasoning process: He started with 2 * 4 = 8 trees. He plants trees for 15 - 10 = 5 years. So he planted 5 * 4 = 20 trees. So he had 20 + 8 = 28 trees. After doubling them he had 28 * 2 = 56 trees.
The answer is 56.