The task is to generate the correct answer for a given math problem.
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Question: Problem: how many numbers between 200 and 600 are divisible by 4 , 5 and 6 ?

Answer: 6


Question: Problem: what is the sum of the multiples of 4 between 63 and 151 inclusive ?

Answer: 233


Question: Problem: a number is doubled and 5 is added . if the resultant is trebled , it becomes 129 . what is that number ?

Answer:
19