Reasoning and answer: He bought the ducks for 30 * 10 = $300. He sold each duck for 4 * 5 = $20. So he sold all the ducks for 30 * 20 = $600. So he made a profit of 600 - 300 = $300.
The answer: 300
What was the question?
Question: John buys 30 ducks for $10 each. They weigh 4 pounds and he sells them for $5 per pound. How much profit did he make?
Regina has 4 pigs / cow * 20 cows = 80 pigs. She could sell the pigs for 80 pigs * $400 / pig = $32000. For the cows Regina would get 20 cows * $800 / cow = $16000. In total Regina would earn $16000 + $32000 = $48000.
The answer: 48000
Reverse engineering the question: Regina has a farm with animals. She has 20 cows and four times more pigs. Someone told her, that she could sell all the animals and earn $400 for each pig and $800 for each cow. How much money would she earn if she would sell all the animals from the farm?
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?
The coach has 8 liters * 1000 ml / liter = 8,000 ml of water. She pours 200 ml / player x 30 players = 6,000 ml of water in total for all the athletes. The water spill means 6,000 ml + 250 ml = 6,250 ml of water was used. There was 8,000 ml - 6,250 ml = 1,750 ml of water left.
The answer: 1750
Reverse engineering the question: There are 30 players on a football team. The coach has 8 liters of water. She pours 200 milliliters of water for every player so they can get hydrated. Unfortunately, there was a water spill and 250ml of water was spilled. How much water was left over?
Reasoning and answer: Patrick bought 2 tickets at $100.00 each for a total of 2 * 100 = $200.00. The oldest son went 35 times and the youngest went 15 times for a total of 35 + 15 = 50 trips. The tickets cost $200.00 and together, the boys went to the park 50 times so each trip cost 200 / 50 = $4.00.
The answer: 4
What was the question?
Question: Patrick buys a season pass for each of his sons to visit the local amusement park as often as they want. The passes were $100.00 each. The oldest son went to the park 35 times over the summer and the youngest went 15 times. What was the cost per trip to the park?
Reasoning and answer: William broke 4 * 2 = 8 glasses. So, David and William broke 8 + 2 = 10 glasses.
The answer: 10
What was the question?
Question:
Yesterday, David and William were invited to a party. David broke 2 glasses, while his friend William broke 4 times the number of glasses David broke. How many glasses were broken?