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 shirt goes on sale for 80% of its original price. One week later, the sale price is marked down 20%. The final price is what percent of the original price?

 Option A: 72%

 Option B: 70%

 Option C: 52%

 Option D: 64%

 Option E: 28%

SOLUTION: Option D

PROBLEM: Question: 8 persons can build a wall 140m long in 42 days. In how many days can 30 persons complete a similar wall 100 m long?

 Option A: 12

 Option B: 10

 Option C: 8

 Option D: 6

 Option E: 5

SOLUTION: Option C

PROBLEM: Question: A person purchased a TV set for Rs. 16000 and a DVD player for Rs. 6250. He sold both the items together for Rs. 34710
. What percentage of profit did he make?

 Option A: 80%

 Option B: 49%

 Option C: 40%

 Option D: 70%

 Option E: 56%

SOLUTION:
Option E