Reasoning and answer: He's inviting 6 people over and needs 1 / 2 pound of meat for each so that's 6 * .5 = 3 pounds of meat. The beef tenderloin is $15.00 a pound and he needs 3 pounds so that's 15 * 3 = $45.00 for dinner.
The answer: 45
What was the question?
Question: Antoine is having a dinner party and his butcher recommends 1/2 pound of meat per person. If he's inviting 6 people over and the beef tenderloin is $15.00 a pound, how much will this cost him?


The perimeter of the field is 20 + 20 + 60 + 60 = 160 feet. Joy will have 250 - 160 = 90 feet of tape left over.
The answer: 90
Reverse engineering the question: Joy has 250 feet of tape. She wants to wrap the tape around a field that is 20 feet wide and 60 feet long. How much tape will Joy have left over after wrapping tape around the field once?


Reasoning and answer: He gets 6 * 5 = 30 hours of sleep on 5 days. He gets 10 * 2 = 20 hours the other days. So he got 30 + 20 = 50 hours.
The answer: 50
What was the question?
Question: Tim sleeps 6 hours per day for 5 days a week and 10 hours a day for the other 2. How much total sleep does he get?


First we find out how long it would take Mr. Harris to walk to your destination, which we find by multiplying his 2 hour walk by 3 since your destination is 3 times further away, meaning it would take him 2 * 3 = 6 hours. Since you walk twice as fast, it would take you half the time. Half of 6, 6 / 2 = 3 hours in total.
The answer: 3
Reverse engineering the question: You walk twice as fast as Mr. Harris, and Mr. Harris took 2 hours to walk to the store. If your destination is 3 times further away than the store Mr. Harris walked to, how many hours will it take you to get there?


Reasoning and answer: First find how long it takes Janet to cross the lake: 60 miles / 30 miles / hour = 2 hours. Then find how long it takes her sister to cross the lake: 60 miles / 12 miles / hour = 5 hours. Then subtract Janet's travel time from her sister's travel time to find the difference: 5 hours - 2 hours = 3 hours.
The answer: 3
What was the question?
Question: Janet starts driving across a lake in a speedboat going 30 miles per hour. Her sister follows in a sailboat that has a speed of 12 miles per hour. If the lake is 60 miles wide, how long does Janet have to wait on the other side for her sister to catch up?


Reasoning and answer: In 2 minutes, 12 liters of water flow into the bathtub and 2 liters (2 minutes x 1 liter / minute ) escape. This will leave 12 – 2 = 10 liters of water every two minutes. We can divide the number of liters by the number of minutes to find the average flow per minute, which is 10 / 2 = 5 liters per minute. To fill the tub, it will take 120 liters / 5 liters / min = 24 min.
The answer: 24
What was the question?
Question:
Robi Ney wants to fill a 120-liter tub. He is amused by letting the water run for 1 minute, then closing the water supply for 1 minute, and so on alternating opening and closing the water supply. But the cap at the bottom of the tub is not very airtight and lets 1 liter of water escape per minute. The flow rate of the tap is 12 liters per minute. How long does it take to fill the tub in minutes?