TASK DEFINITION: You are given a math word problem and you are supposed to make use of mathematical concepts like probability, combinatorics, linear equations, sequences/series, or simple operators like addition, subtraction, division, or multiplication to answer the given question. Choose the best option from the 5 given options and report that option.
PROBLEM: Question: A sum of Rs. 12500 amounts to Rs. 16000 in 4 years at the rate of simple interest. What is the rate of interest?

 Option A: 7%

 Option B: 5%

 Option C: 6%

 Option D: 8%

 Option E: 14%

SOLUTION: Option A

PROBLEM: Question: A candidate got 32% of the votes polled and he lost to his rival by 1908 votes. How many votes were cast?

 Option A: 5100

 Option B: 5200

 Option C: 5300

 Option D: 5400

 Option E: 5500

SOLUTION: Option C

PROBLEM: Question: Two pens and one eraser cost Rs. 35 and 3 pencil and four erasers cost Rs. 65. Find the cost of pencil and eraser separately.

 Option A: 5,15

 Option B: 15,5

 Option C: 5,10

 Option D: 10,5

 Option E: 20,5

SOLUTION:
Option B