instruction:
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.
question:
Problem: what is the smallest positive integer x such that 66 - x is the cube of a positive integer
Options: a. 5, b. 7, c. 47, d. 9, e. 2
answer:
e


question:
Problem: an aeroplane covers a certain distance at a speed of 150 kmph in 2 hours. to cover the same distance in 1 2 / 3 hours, it must travel at a speed of :
Options: a. 1300 kmph, b. 160 kmph, c. 180 kmph, d. 1080 kmph, e. none
answer:
c


question:
Problem: the current of a stream runs at the rate of 4 kmph. a boat goes 6 km and back to the starting point in 2 hours, then find the speed of the boat in still water ?
Options: a. 5, b. 6, c. 8, d. 4, e. 1
answer:

c