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.

[EX Q]: Question: The difference of two numbers is 1365. on dividing the larger number by the smaller, we get 6 as quotient and 15 as remainder. What is the smaller number?

 Option A: 240

 Option B: 270

 Option C: 295

 Option D: 360

 Option E: None of these
[EX A]: Option B

[EX Q]: Question: The average age of 3 boys is 15 years and their ages are in the proportion 1:2:3. The age of the youngest boy is?

 Option A: 10 years

 Option B: 12 years

 Option C: 15 years

 Option D: 18 years

 Option E: 7.5 years
[EX A]: Option E

[EX Q]: Question: A person travelled from his house to office at 45km/hr and office to house at 55km/hr. Then find the average speed?

 Option A: 49km/hr

 Option B: 49.5km/hr

 Option C: 50km/hr

 Option D: 50.5km/hr

 Option E: 51km/hr
[EX A]:
Option B