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.

[Q]: Question: A fish can go upstream at 35 kmph and downstream at 55 kmph, and then find the speed of the fish in still water?

 Option A: 45

 Option B: 55

 Option C: 35

 Option D: 65

 Option E: 70
[A]: Option A


[Q]: Question: (700 + 200) Ã— 4 Ã— (4 + 2) = ?

 Option A: 24500

 Option B: 21600

 Option C: 36600

 Option D: 22400

 Option E: 12500
[A]: Option B


[Q]: Question: If 25/999=0.002, what is the 81st digit to the right of the decimal point in the decimal equivalent of the fraction?

 Option A: 6

 Option B: 5

 Option C: 4

 Option D: 3

 Option E: 2
[A]:
Option E