The task is to generate the correct answer for a given math problem.

Example Input: Problem: the sum of ages of 5 children born 1 years different each is 30 years . what is the age of the elder child ?
Example Output: 8

Example Input: Problem: in a village of 2,500 people , 800 people are over 70 years old and 850 people are female . it is known that 40 percent of the females are younger than 70 years old . if no one in the village is 70 years old , what is the probability that a person chosen at random is either a male or younger than 70 years old ?
Example Output: 199 / 250

Example Input: Problem: joe ’ s average ( arithmetic mean ) test score across 4 equally weighted tests was 70 . he was allowed to drop his lowest score . after doing so , his average test score improved to 75 . what is the lowest test score that was dropped ?
Example Output:
55