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 certain number of workers can do a work in 85 days. If there were 10 workers more it could be finished in 10 days less. How many workers are there?

Option A: 75

Option B: 30

Option C: 28

Option D: 24

Option E: 32

SOLUTION: Option A

PROBLEM: Question: which no. need to add to 859622 to get a number exactly divisible by 456?

Option A: 345652

Option B: 547678

Option C: 356789

Option D: 778990

Option E: 859622

SOLUTION: Option E

PROBLEM: Question: A grocery shop has a sale of Rs. 6635, Rs. 6927, Rs. 6855, Rs. 7230 and Rs. 6562 for 5 consecutive months. How much sale must he have in the sixth month so that he gets an average sale of Rs. 6500?

Option A: 4857

Option B: 4184

Option C: 4012

Option D: 4791

Option E: 5291

SOLUTION:
Option D