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 river 5m deep and 19 m wide is flowing at the rate of 4 kmph the amount of water that runs into the sea per minute is?

 Option A: 4500

 Option B: 6333

 Option C: 6576

 Option D: 6345

 Option E: 2882

SOLUTION: Option B

PROBLEM: Question: A is twice as fast as B. If B alone can do a piece of work in 18 days, in what time can A and B together complete the work?

 Option A: 10

 Option B: 16

 Option C: 18

 Option D: 6

 Option E: 12

SOLUTION: Option D

PROBLEM: Question: find the number of 6 digit numbers that can be formed using digits 1,2,3,4,5,6 once such that the 6digit number is divisible by its unit digit.

 Option A: 648

 Option B: 649

 Option C: 650

 Option D: 651

 Option E: 652

SOLUTION:
Option A