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: the average age of a family of 5 members is 20 years. if the age of the youngest member be 10 years then what was the average age of the family at the time of the birth of the youngest member ?
Options: a. 13.5, b. 14, c. 15, d. 12.5, e. none

SOLUTION: d

PROBLEM: Problem: the ratio of the present age of viju to that of aju is 7: 2. 4 years from now, the ratio of the ages of viju to aju will be 5: 2. what was viju age 5 years ago ? ( rbi assistant 2015 )
Options: a. 24, b. 18, c. 12, d. 16, e. 13

SOLUTION: d

PROBLEM: Problem: if q is a positive integer and q ^ 2 is divisible by 12, then the largest positive integer that must divide q ^ 3 is
Options: a. 2 ^ 3, b. 2 ^ 6, c. 3 ^ 3, d. 6 ^ 3, e. 12 ^ 2

SOLUTION:
d