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 11 10 prime numbers which are odd is ?
Options: a. 17.72, b. 18.52, c. 19.63, d. 16.53, e. 15.63

SOLUTION: a

PROBLEM: Problem: what is the compound interest paid on a sum of rs. 3000 for the period of 2 years at 10 % per annum.
Options: a. 630, b. 620, c. 610, d. 600, e. none of these

SOLUTION: a

PROBLEM: Problem: if x = 1 + √ 2, then what is the value of x 4 - 4 x 3 + 4 x 2 + 3 ?
Options: a. - 1, b. 0, c. 4, d. 2, e. 3

SOLUTION:
c