Reasoning and answer: Let j be the cost of the jellyfish and e be the cost of the eel. We know that j + e = $200 and e = 9j. Substituting the second equation into the first equation, we get j + 9j = $200. Combining like terms, we get 10j = $200. Dividing both sides by 10, we get j = $20. Substituting this value back into e = 9j, we get e = 9 * $20 = $180.
The answer: 180
What was the question?
Question: An avant-garde sushi house sells jellyfish for a certain amount and eel for nine times that amount. If the combined cost of one order each kind of sushi is $200, how much does the eel cost?


In each pair of socks there are 2 / 1 = 2 socks. Steve has 2 * 4 = 8 matching socks. Steve has 25 - 8 = 17 mismatching socks.
The answer: 17
Reverse engineering the question: Steve has 25 socks. He has 4 pairs of socks that match, and all the others don't match. How many mismatching socks does Steve have altogether?


Reasoning and answer: Ofelia saves $10 x 2 = $20 in February. She will save $20x 2 = $40 in March. She will save $40 x 2 = $80 in April. Thus, she will save $80 x 2 = $160 in May.
The answer: 160
What was the question?
Question: Ofelia joined a saving challenge wherein she has to save twice the amount she saved from the previous month. In January, she saved $10. How much is she going to save in May?


Twice the amount Nigel originally had is 2 * 45 = 90 dollars. Now, Nigel has 10 dollars more, meaning that he has 10 + 90 = 100 dollars. Before his mother gave him 80 dollars, he had been left with 100 - 80 = 20 dollars. This means that Nigel gave away 45 - 20 = 25 dollars.
The answer: 25
Reverse engineering the question: Nigel won $45 but gave some away. His mother gave him $80 more. If now Nigel has $10 more than twice the amount he originally had, how much money did he give away?


Reasoning and answer: The total number of petals Mabel has in her garden is 5 x 8 = 40 petals. The total number of petals that Mabel gives to her teacher is 2 x 8 = 16 petals. The total number of petals remaining in her garden is 40 - 16 = 24 petals.
The answer: 24
What was the question?
Question: Mabel has 5 daisies in her garden, and each daisy has 8 petals. If she gives 2 daisies to her teacher, how many petals does she have on the remaining daisies in her garden?


Reasoning and answer: Let C be the number of lion cubs. There are 2C meerkats in the new exhibit. The zoo sent 4 gorillas away, so they had 68 - 6 = 62 animals left. They adopted a hippopotamus, so they had 62 + 1 = 63 animals. They took in 3 rhinos, so they had 63 + 3 = 66 animals. Thus, they had 90 - 66 = 24 new lion cubs and meerkats. Therefore, they had C + 2C = 3C = 24 new lion cubs as meerkats. Hence, there were C = 24 / 3 = 8 lion cubs born.
The answer: 8
What was the question?
Question:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
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A small zoo houses a variety of 68 wild animals. After they send a gorilla family of six to a different zoo, they adopt a hippopotamus from another zoo. A while later, an animal rescue contacted them, and the zoo took in three endangered rhinos. Then one of their lionesses gave birth to cubs, and they opened a meerkat exhibit with twice as many meerkats as they had gained lion cubs. The zoo then had 90 animals in all. How many lion cubs were born at the zoo?