The task is to generate the correct answer for a given math problem.
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Question: Problem: a cistern is normally filled in 6 hours but takes two hours longer to fill because of a leak in its bottom . if the cistern is full , the leak will empty it in ?

Answer: 24


Question: Problem: if x = 1 + √ 2 , then what is the value of x 4 - 4 x 3 + 4 x 2 + 3 ?

Answer: 4


Question: Problem: if x and y are integers and | x - y | = 10 , what is the minimum possible value of xy ?

Answer:
- 25