For March, April, September and October, she cuts her lawn 2 a month. There are 4 months so she cuts her yard 2 * 4 = 8 times. For May, June, July and August, she cuts her lawn 4 times a month. There are 4 months so she cuts her yard 4 * 4 = 16 times. During the entire 8 month period, she cuts her lawn 8 + 16 = 24 times. Every 4th time she cuts, she needs 2 gallons of gas. If she cuts her lawn 24 times a year then she needs to fill up 24 / 4 = 6 times. Each time she fills up, it takes 2 gallons of gas so 2 * 6 = 12 gallons of gas per year.
The answer: 12
Reverse engineering the question: Helen cuts her lawn starting in March and finishes in October. Her lawn mower uses 2 gallons of gas every 4th time she cuts her lawn. For March, April, September and October, she only cuts her law 2 times per month. In May, June, July and August, she has to cut her lawn 4 times per month. How many gallons of gas will she need to cut her lawn from March through October?
Reasoning and answer: Per day, the amount of milk produced is 1000 * 52 = 52000 oz. Per week, the amount of milk produced is 52000 * 7 = 364000 oz.
The answer: 364000
What was the question?
Question: A cattle breeder owns 52 dairy cows. Each cow gives 1000 oz of milk per day. Calculate the amount of milk produced per week by the cows.
He bought 20 / 2 = 10 pounds of pork. So he has 20 + 10 = 30 pounds of meat. That means he can make 30 / 1.5 = 20 meals. So he makes 20 * 20 = $400.
The answer: 400
Reverse engineering the question: James buys 20 pounds of beef and half that much pork. He uses 1.5 pounds of meat to make meals at his restaurant. Each meal sells for $20. How much money did he make?
Reasoning and answer: There are 20 x 2 = 40 students in the band. There are 12 + 16 = 28 students in the choir. In total there are 20 + 40 + 28 = 88 students.
The answer: 88
What was the question?
Question: There are 20 students in the orchestra and twice that number in the band. There are 12 boys and 16 girls in the choir. If each student only participates in one group, how many students, in total, are there in the orchestra, the band, and the choir?
Let D = time in minutes to vacuum downstairs. Upstairs = 2D + 5 minutes. 3D + 5 = 38. 3D = 33. D = 11 minutes. Upstairs = (2 * 11) + 5 = 27 minutes. Dad took 27 minutes to vacuum upstairs.
The answer: 27
Reverse engineering the question: It took Dad 5 more than twice as long to vacuum upstairs then to vacuum downstairs. He vacuumed for a total of 38 minutes. How many minutes did he vacuum upstairs?
There will be a total of (1) Brian + (1) Brian's wife + (2) two kids + (2) Brian's parents + (2) Brian's in - laws = 1 + 1 + 2 + 2 + 2 = 8 people eating. If 1 person eats 2 serving of lasagna then 8 people will eat 8 * 2 = 16 servings. If each serving requires 1 / 2 cup of milk then 16 servings require 16 * 1 / 2 cups = 8 cups of milk. If one cup of milk equals 250 ml, then 8 cups of milk equal 8 * 250 = 2000 ml of milk. 1L carton of milk equals 1000ml of milk, therefore Brian needs 2000 / 1000 = 2 cartons of 1L milk.
The answer: 2
Reverse engineering the question:
One US cup equals 250ml. Brian is making lasagna for himself, his wife, his two kids, his parents, and his wife's parents. The recipe requires 1/2 a cup of milk per serving. How many 1L cartons of milk does Brian need to buy if each person is expected to eat 2 servings?