TASK DEFINITION: The task is to generate the correct answer for a given math problem.
PROBLEM: Problem: find the simple interest on rs . 70,000 at 16 2 / 3 % per year for 9 months .

SOLUTION: 8750

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 ages of 5 children born at the intervals of 2 years each is 55 years . what is the age of the youngest child ?

SOLUTION:
7