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

SOLUTION: b

PROBLEM: Problem: the average of first six prime numbers greater than 20 is ?
Options: a. 10, b. 20, c. 30, d. 40, e. 34

SOLUTION: e

PROBLEM: Problem: a number x is 6 times another number y. the percentage that y is less than x is
Options: a. 12.5 %, b. 83.3 %, c. 80 %, d. 11 %, e. 1 %

SOLUTION:
b