TASK DEFINITION: The task is to generate the correct answer for a given math problem.
PROBLEM: Problem: find the sum the difference between the compound and s . i . on a certain sum of money for 5 years at 20 % per annum is rs . 75 of money ?

SOLUTION: 1875

PROBLEM: Problem: if a - b = 5 and a 2 + b 2 = 31 , find the value of ab .

SOLUTION: 3

PROBLEM: Problem: a person incurs a loss of 5 % be selling a watch for rs . 1140 . at what price should the watch be sold to earn 5 % profit

SOLUTION:
rs . 1260