Part 1. 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.
Part 2. Example
From a pack of 52 cards, two cards are drawn together at random. What is the probability of both the cards being kings? 

 Option A:2/1223 

 Option B: 1/122 

 Option C: 1/221 

 Option D: 3/1253 

 Option E: 2/153 


Answer: Option C
Explanation: Let s be the sample space. 
 Then n(s) = 52C2 = 1326 
 E = event of getting 2 kings out of 4 
 n(E) = 4C2 = 6 
 P(E) = 6/1326 = 1/221
Part 3. Exercise
Question: The distance between two planets is 4 × 10^6 light years. What is the distance between the two planets, in parsecs? (1 parsec = 3.26 light years)

 Option A:  9.3 × 10^5

 Option B:  9.9 × 10^6

 Option C:  9.3 × 10^7

 Option D:  9.9 × 10^7

 Option E:  1.2 × 10^6
Answer:
Option E