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 ratio of the volumes of two cubes is 1331: 2197. what is the ratio of their total surface areas ?
Options: a. 121: 169, b. 169: 122, c. 81: 124, d. 81: 126, e. 81: 129
answer:
a


question:
Problem: a shopkeeper buys mangoes at the rate of 5 a rupee and sells them at 2 a rupee. find his net profit or loss percent ?
Options: a. 34 %, b. 30 %, c. 50 %, d. 150 %, e. 33 %
answer:
d


question:
Problem: if a number n is chosen at random from the set of two - digit integers whose digits are both prime numbers, what is the probability e that n is divisible by 3 ?
Options: a. 1 / 3, b. ¼, c. 9 / 25, d. 5 / 16, e. 0
answer:

d