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: the average of first 10 natural numbers is ?
Options: a. 5.6, b. 5.5, c. 5.1, d. 5.8, e. 5.2
answer:
b


question:
Problem: if john makes a contribution to a charity fund at school, the average contribution size will increase by 50 % reaching $ 75 per person. if there were 1 other contributions made before john ' s, what is the size of his donation ?
Options: a. $ 100, b. $ 150, c. $ 200, d. $ 250, e. $ 450
answer:
a


question:
Problem: if 7 cats can kill 7 rats in 7 minutes, how long will it take 100 cats to kill 100 rats ?
Options: a. 5 minutes, b. 6 minutes, c. 7 minutes, d. 8 minutes, e. 9 minutes
answer:

c