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: A tank holds x gallons of a saltwater solution that is 20% salt by volume. One Fourth of the water is evaporated, leaving all of the salt. When 5 Gallons of water and 10 gallons of salt are added, the resulting mixture is 33 1/3 % salt by volume. What is the value of x?

 Option A: 37.5

 Option B: 75

 Option C: 100

 Option D: 150

 Option E: 175

SOLUTION: Option B

PROBLEM: Question: Two dice are tossed. The probability that the total score is a prime number is:

 Option A: 5/5

 Option B: 5/9

 Option C: 5/1

 Option D: 5/7

 Option E: 5/12

SOLUTION: Option E

PROBLEM: Question: What is the least common multiple of 12,15,18,27

 Option A: 640

 Option B: 540

 Option C: 691

 Option D: 385

 Option E: 789

SOLUTION:
Option B