TASK DEFINITION: The task is to generate the correct answer for a given math problem.
PROBLEM: Problem: a certain elevator has a safe weight limit of 2,000 pounds . what is the greatest possible number of people who can safely ride on the elevator at one time with the average ( arithmetic mean ) weight of half the riders being 200 pounds and the average weight of the others being 230 pounds ?

SOLUTION: 9

PROBLEM: Problem: the product of two successive numbers is 4160 . which is the smaller of the two numbers ?

SOLUTION: 64

PROBLEM: Problem: a cab driver 5 days income was $ 300 , $ 150 , $ 750 , $ 200 , $ 600 . then his average income is ?

SOLUTION:
$ 400