Question: Roberto is raising chickens for eggs. He buys 4 chickens for $20 each. They cost $1 in total a week to feed and each produces 3 eggs a week that will last forever. He used to buy 1 dozen eggs a week and spent $2 per dozen. After how many weeks will the chickens be cheaper than buying his eggs?
Answer: The chickens cost $80 because 4 x 20 = 80. His chickens produce a dozen eggs a week because 4 x 3 = 12. Each week that he has chickens is $1 cheaper than buying eggs because 2 - 1 = 1. After 80 weeks his chickens will be paid off because 80 / 1 = 80. After 81 weeks the chickens will be cheaper than buying eggs because 80 + 1 = 81. The answer is 81.
[Question]Ali had a stock of 800 books in his Room. He sold 60 on Monday, 10 on Tuesday, 20 on Wednesday, 44 on Thursday and 66 on Friday. How many books were not sold?
[Answer]We look first for the total number of books that were sold: 60 + 10 + 20 + 44 + 66 = 200 books. So the total number of books that were not sold is: 800 – 200 = 600 books. The answer is 600.
Q: Mr. Rainwater has some goats, 9 cows and some chickens. He has 4 times as many goats as cows and 2 times as many goats as chickens. How many chickens does he have?
A: Let X be the number of chickens Mr. Rainwater has. He has 4 goats / cow * 9 cows = 36 goats on his farm. So he has 36 goats / 2 goats / chicken = 18 chickens. The answer is 18.
Question: There are 4 wolves out hunting for the pack. The pack contains 16 additional wolves. Each wolf needs to eat 8 pounds of meat a day and the wolves won't hunt again for five days. If each deer contains 200 pounds of meat, how many deer does each wolf need to kill?
Answer: The wolf pack has 20 members because 4 + 16 = 20. They need 160 pounds of meat a day because 20 x 8 = 160. They need 800 pounds to last five days because 5 x 160 = 800. The hunters need to kill 4 deer because 800 / 200 = 4. They each need to kill one deer because 4 / 4 = 1. The answer is 1.
[Question]Rich ran a 24-mile marathon in 3 hours and 36 minutes. On average, how long, in minutes, did it take Rich to run a mile during the race?
[Answer]3 hours is 3 * 60 = 180 minutes. Thus 3 hours and 36 minutes is 180 + 36 = 216 minutes. Thus, he ran the 24 miles in 216 minutes, and each mile took 216 / 24 = 9 minutes for Rich to run. The answer is 9.
[Question]Brad’s zip code consists of five numbers that add up to 10. The first and second numbers are the same. The third number is zero. The fourth number is double the first number. The fourth and fifth numbers add up to 8. What is Brad’s zip code?
[Answer]
The five numbers add up to 10, so the first three numbers add up to 10 - 8 = 2. The third number is 0, so the first two numbers add up to 2 - 0 = 2. The first and second numbers are equal, so they are both 2 / 2 = 1. The fourth number is double the first number, so it is 2 * 1 = 2. The fifth number is 8 - 2 = 6. Thus, Brad’s zip code is 11026. The answer is 11026.