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: increasing the original price of a certain item by 25 percent and then increasing the new price by 30 percent is equivalent to increasing the original price by what percent ?
Options: a. 31.25, b. 37.5, c. 50.0, d. 52.5, e. 62.5

SOLUTION: e

PROBLEM: Problem: a train 50 m long takes 6 sec to cross a man walking at 5 kmph in a direction opposite to that of the train. find the speed of the train ?
Options: a. 15 kmph, b. 25 kmph, c. 35 kmph, d. 45 kmph, e. 55 kmph

SOLUTION: b

PROBLEM: Problem: a can run 4 times as fast as b and gives b a start of 60 m. how long should the race course be so that a and b might reach in the same time ?
Options: a. 70 m, b. 60 m, c. 80 m, d. 65 m, e. 75 m

SOLUTION:
c