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: In what time will a train 200 m long cross an electric pole, it its speed be 144 km/hr?

 Option A: 2.5 sec

 Option B: 2.9 sec

 Option C: 3.5 sec

 Option D: 7.5 sec

 Option E: 5 sec

SOLUTION: Option E

PROBLEM: Question: The greatest number that divides 180, 565 and 705 leaving remainder 5, 5 and 5 respectively is:

 Option A: 31

 Option B: 33

 Option C: 35

 Option D: 38

 Option E: 39

SOLUTION: Option C

PROBLEM: Question: David completes a piece of work in 5 days, John completes the same work in 9 days. If both of them work together, then the number of days required to complete the work is?

 Option A: 3.2 days

 Option B: 8 days

 Option C: 10 days

 Option D: 12 days

 Option E: 14 days

SOLUTION:
Option A