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.

[EX Q]: 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
[EX A]: Option A

[EX Q]: Question: On dividing a number by 7, we get 3 as quotient and 0 as remainder. On dividing the same number by 3, what will be the remainder?

 Option A: 1

 Option B: 2

 Option C: 3

 Option D: 0

 Option E: 4
[EX A]: Option D

[EX Q]: Question: A man walks at a speed of 3 km/hr and runs at a speed of 7 km/hr. How much time will the man require to cover a distance of 10 1/2 km, if he completes half of the distance, i.e., (5 1/4) km on foot and the other half by running?

 Option A: 2 1/0

 Option B: 2 1/8

 Option C: 2 1/5

 Option D: 2 1/3

 Option E: 2 1/2
[EX A]:
Option E