TASK DEFINITION: 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.
PROBLEM: Problem: students at a school were on average 180 cm tall. the average female height was 170 cm, and the average male height was 182 cms. what was the ratio of men to women ?
Options: a. 5: 2, b. 5: 1, c. 4: 3, d. 4: 1, e. 3: 1

SOLUTION: b

PROBLEM: Problem: if y exceeds x by 25 %, then x is less than y by ?
Options: a. 28 %, b. 21 %, c. 20 %, d. 30 %, e. 29 %

SOLUTION: c

PROBLEM: Problem: a rectangular block 15 cm by 30 cm by 75 cm is cut into an exact number of equal cubes. find the least possible number of cubes ?
Options: ['a. 6', 'b. 40', 'c. 15', 'd. 10', 'e. 22']

SOLUTION:
d