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: walking at 4 / 5 of her normal speed, a worker is 10 minutes later than usual in reaching her office. the usual time ( in minutes ) taken by her to cover the distance between her home and her office is
Options: a. 30, b. 35, c. 40, d. 45, e. 50

SOLUTION: c

PROBLEM: Problem: what is the area of a regular hexagon with sides 1 in. long ?
Options: a. 1.59 square inch, b. 2.59 square inch, c. 3.59 square inch, d. 4.59 square inch, e. 2.69 square inch

SOLUTION: b

PROBLEM: Problem: alan buys 4 tvs, a 26 inch, a 28 inch, a 30 inch, and a 32 inch, for his new house. each tv costs $ 200 more than the size below it. alan spends a total of $ 3,600. how much would he have spent if he had bought only the 28 inch and 30 inch tvs ?
Options: a. 850, b. 1,100, c. 1,800, d. 2,550, e. 3,400

SOLUTION:
c