TASK DEFINITION: The task is to generate the correct answer for a given math problem.
PROBLEM: Problem: bob wants to run a mile in the same time as his sister . if bob ’ s time for a mile is currently 11 minutes 20 seconds and his sister ’ s time is currently 9 minutes 36 seconds , by what percent does bob need to improve his time in order run a mile in the same time as his sister ?

SOLUTION: 15 

PROBLEM: Problem: the sum of the even numbers between 1 and n is 89 * 90 , where n is an odd number , then n = ?

SOLUTION: 179

PROBLEM: Problem: a part of certain sum of money is invested at 16 % per annum and the rest at 20 % per annum , if the interest earned in each case for the same period is equal , then ratio of the sums invested is ?

SOLUTION:
5 :