instruction:
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.
question:
Problem: what is the value of n if the sum of the consecutive odd intergers y from 1 to n equals 169 ?
Options: a. 47, b. 25, c. 37, d. 33, e. 29
answer:
b

question:
Problem: the average age of 8 men increases by 2 years when two women are included in place of two men of ages 20 and 22 years. find the average age of the women ?
Options: a. 87, b. 98, c. 30, d. 29, e. 37
answer:
d

question:
Problem: a train is 250 meter long is running at a speed of 36 km / hour. in what time will it pass a station of 200 meter length ?
Options: a. 28 seconds, b. 27 seconds, c. 45 seconds, d. 26 seconds, e. 18 seconds
answer:
c