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: find the sum of first 89 odd numbers
Options: a. 7921, b. 4800, c. 7900, d. 4980, e. 4960
answer:
a


question:
Problem: in an office, totally there are 2800 employees and 25 % of the total employees are males. 30 % of the males in the office are at - least 50 years old. find the number of males aged below 50 years ?
Options: a. 390, b. 490, c. 400, d. 460, e. none of these
answer:
b


question:
Problem: what is the tens digit of 6 ^ 19 ?
Options: a. 1, b. 3, c. 5, d. 7, e. 9
answer:

e