Reasoning and answer: The original flock gains 30 - 20 = 10 ducks per year. So after 5 years they have gained 10 * 5 = 50 ducks. So the original flock has 100 + 50 = 150 ducks. So the combined flock has 150 + 150 = 300 ducks.
The answer: 300
What was the question?
Question: Every year 20 ducks from a flock are killed but another 30 are born. The original flock size is 100 ducks. After 5 years they join with another flock of 150 ducks. How many ducks are in the combined flock?


The bride wanted 50 * .6 = 30 more guests than the husband. So the bride wanted 50 + 30 = 80 guests. So the guests cost 80 * $500 = $40000. So the total cost was $40000 + $10,000 = $50000.
The answer: 50000
Reverse engineering the question: John is budgeting for his marriage. The venue cost $10,000. It cost $500 for each guest, and John wants 50 guests while his wife wants 60% more than that. How much would the wedding cost if John's wife gets her way?


Reasoning and answer: Let the number of square feet in Benedict's house be x. So, we can write the equation 4 * x + 600 = 10000. Subtracting 600 from both sides we get 4 * x = 9400. Dividing both sides by 4 we get x = 2350 square feet.
The answer: 2350
What was the question?
Question: Kennedy's house is 600 square feet larger than 4 times Benedict's house. If Kennedy's house is 10000 square feet, how many square feet is Benedict's house?


Each part is 10 / 5 = 2 meters long. Therefore, 2 x 3 = 6 meters of yarn were used for crocheting.
The answer: 6
Reverse engineering the question: A 10 meters yarn was cut into 5 equal parts. If 3 parts were used for crocheting, how long was used for crocheting?


Reasoning and answer: For interrupting, Jerry got 5 points per interruption * 2 interruptions = 10 points. For insulting, he got 10 points per insult * 4 insults = 40 points. To get to the 100 limit points, Jerry has 100 points - 10 points - 40 points = 50 points left. He still has 50 points / 25 points per throw = 2 throws.
The answer: 2
What was the question?
Question: Mrs. Carlton gives out penalty points whenever her students misbehave. They get 5 points for interrupting, 10 points for insulting their classmates, and 25 points for throwing things. If they get 100 points, they have to go to the office. Jerry already interrupted twice and insulted his classmates 4 times. How many times can he throw things before he gets sent to the office?


Reasoning and answer: The tree has been planted for 9 - 4 = 5 years. It will take another 7 - 5 = 2 years for it to bear fruit. Lydia will be 9 + 2 = 11 years old.
The answer: 11
What was the question?
Question:
It takes 7 years for an apple tree to bear fruit. If Lydia planted a tree when she was 4 years old and is now 9 years old, how old would she be when she gets to eat an apple from her tree for the first time?