TASK DEFINITION: Given a math problem with context and a question and 5 answer choices, the task is to provide the correct answer choice based on the problem. You must choose one of the given answer choices by letter: a, b, c, d, or e; anything else is invalid.
PROBLEM: Problem: a sum of money at simple interest amounts to rs. 720 after 2 years and to rs. 1020 after a further period of 5 years. the sum is :
Options: a. 400, b. 500, c. 600, d. 700, e. 800

SOLUTION: c

PROBLEM: Problem: a mixture of 70 litres of milk and water contains 10 % water. how many litres of water should be added to the mixture so that the mixture contains 12 1 / 2 % water ?
Options: a. 2, b. 8, c. 6, d. 3, e. 4

SOLUTION: a

PROBLEM: Problem: a man can do a piece of work in 7 days, but with the help of his son, he can finish it in 3 days. in what time can the son do it alone ?
Options: a. 5, b. 4 1 / 5, c. 7 1 / 2, d. 6, e. 9 1 / 2

SOLUTION:
b