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: 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: 3 ltr of water is added with 9 ltr of a solution containing 57 % of alcohol in the water. the % of alcohol in the new mixture is ?
Options: a. 41.5 %, b. 42.75 %, c. 43 %, d. 45 %, e. 45.75 %

SOLUTION: b

PROBLEM: Problem: a glass was filled with 10 ounces of water, and 0.01 ounce of the water evaporated each day during a 20 - day period. what percent of the original amount of water evaporated during this period ?
Options: a. 0.002 %, b. 0.02 %, c. 0.2 %, d. 2 %, e. 20 %

SOLUTION:
d