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: Simplify: 250 x 250 - 100 x 100

 Option A: 761200

 Option B: 761400

 Option C: 52500

 Option D: 761500

 Option E: None of them

SOLUTION: Option C

PROBLEM: Question: If 375*s is a perfect square then s can be which of the following numbers?

 Option A: 21

 Option B: 35

 Option C: 54

 Option D: 15

 Option E: 150

SOLUTION: Option D

PROBLEM: Question: If the average costs of three colors of 20,40,60 chocolates respectively is 10,15,20 what is the average costs of all the chocolates?

 Option A: 12.22

 Option B: 13.33

 Option C: 14.44

 Option D: 15.55

 Option E: 16.66

SOLUTION:
Option E