The task is to generate the correct answer for a given math problem.
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Question: Problem: calculate the sum of first 60 natural numbers .

Answer: 1830

Question: Problem: a can do a work in 15 days and b in 20 days . if they work on it together for 5 days , then the fraction of the work that is left is

Answer: 5 / 12

Question: Problem: the sum of two consecutive numbers is 37 . what are they ?

Answer:
18 and 19