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: Find the least number by which (59)(36)(17) has to be multiplied to obtain a perfect square?

 Option A: 5

 Option B: 17

 Option C: 85

 Option D: 221

 Option E: 223
[EX A]: Option C

[EX Q]: Question: If p and q are positive integers each greater than 1, and 17(p+1)=20(q+1), what is the least possible value of p+q?

 Option A: 35

 Option B: 42

 Option C: 44

 Option D: 46

 Option E: none
[EX A]: Option A

[EX Q]: Question: The ratio of two speeds of two trains is 3 to 4. If each of the trains slows its speed 5 km/ hr, what will be the ratio of these two train speeds ?

 Option A: 3/4

 Option B: 8/9

 Option C: 18/19

 Option D: 23/24

 Option E: It cannot be determined from the information given
[EX A]:
Option E