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: what percent is 6 gm of 1 kg ?
Options: a. 1.5 %, b. 0.5 %, c. 0.6 %, d. 3.5 %, e. 4 %
answer:
c

question:
Problem: if the cost price of 50 articles is equal to the selling price of 45 articles, then the gain or loss percent is ?
Options: a. 11.11, b. 65, c. 78, d. 33, e. 25
answer:
a