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: how many prime numbers are between 29 / 3 and 87 / 6 ?
Options: a. 1, b. 2, c. 3, d. 4, e. 5

SOLUTION: b

PROBLEM: Problem: a clock shows the time as 9 a. m. if the minute hand gains 7 minutes every hour, how many minutes will the clock gain by 6 p. m. ?
Options: a. 30 min, b. 35 min, c. 63 min, d. 50 min, e. 55 min

SOLUTION: c

PROBLEM: Problem: if [ x ] is the greatest integer less than or equal to x, what is the value of [ - 2.6 ] + [ 1.4 ] + [ 2.7 ] ?
Options: a. 0, b. 1, c. 2, d. 6, e. 7

SOLUTION:
a