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: an article with cost price of 180 is sold at 15% profit. what is the selling price?

 Option A: 198

 Option B: 200

 Option C: 204

 Option D: 207

 Option E: 210

SOLUTION: Option D

PROBLEM: Question: In 120 m race, A covers the distance in 36 seconds and B in 45 seconds. In this race A beats B by:

 Option A: 24 m

 Option B: 25 m

 Option C: 22.5 m

 Option D: 9 m

 Option E: 12 m

SOLUTION: Option A

PROBLEM: Question: Ages of two persons differ by 4 years. If 3 years ago, the elder one was 3 times as old the younger one, find their present age

 Option A: 5,9

 Option B: 14,18

 Option C: 16,20

 Option D: 18,22

 Option E: 19,23

SOLUTION:
Option A