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 man rows his boat 85 km downstream and 45 km upstream, taking 2 1/2 hours each time. Find the speed of the stream?

Option A: 6 kmph

Option B: 9 kmph

Option C: 3 kmph

Option D: 8 kmph

Option E: 1 kmph

SOLUTION: Option D

PROBLEM: Question: Look at this series: 8, 43, 11, 41, __, 39, 17, ... What number should fill in the blank?

Option A: 22

Option B: 33

Option C: 14

Option D: 16

Option E: 18

SOLUTION: Option C

PROBLEM: Question: If a person walks at 14 km/hr instead of 10 km/hr, he would have walked 20 km more. The actual distance travelled by him is:

Option A: 50 Km

Option B: 55 Km

Option C: 45 Km

Option D: 35 Km

Option E: 40 Km

SOLUTION:
Option A