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: what is the smallest integer that is multiple of 5, 711
Options: a. a. 70, b. b. 35, c. c. 385, d. d. 280, e. e. 140

SOLUTION: c

PROBLEM: Problem: at what rate percent per annum will a sum of money double in 6 years.
Options: a. 12.5 %, b. 13.5 %, c. 11.5 %, d. 14.5 %, e. 16.6 %

SOLUTION: e

PROBLEM: Problem: the compound interest earned on a sum for the second and the third years are $ 1200 and $ 1260 respectively. what is the rate of interest ?
Options: a. 5 %, b. 8 %, c. 11 %, d. 14 %, e. 18 %

SOLUTION:
a