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: 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
[EX A]: Option D

[EX Q]: Question: The number 46 can be written as the sum of the squares of 3 different positive integers. What is the sum of these 3 integers?

 Option A: 17

 Option B: 16

 Option C: 15

 Option D: 10

 Option E: 13
[EX A]: Option D

[EX Q]: Question: Jonah drove the first half of a 200-mile trip in x hours and the second half in y hours. Which of the following is equal to Jonah’s average speed, in miles per hour, for the entire trip?

 Option A: 100/(x + y

 Option B: 200/(x + y

 Option C: 25/x + 25/y

 Option D: 50/x + 50/y

 Option E: 100/x + 100/y
[EX A]:
Option B