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.
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Question: Question: If one-third of one-fourth of a number is 15, then three-tenth of that number is

 Option A: 35

 Option B: 36

 Option C: 45

 Option D: 54

 Option E: 57

Answer: Option D


Question: Question: Which of the following is greatest?

 Option A: 1/10

 Option B: 1/100

 Option C: 1/1000

 Option D: 1/10^9

 Option E: 1/5

Answer: Option E


Question: Question: If a = 1, what is the value of –(a^2 + a^3 + a^4 + a^5+a^6)?

 Option A: -14

 Option B: -4

 Option C: 0

 Option D: 4

 Option E: -5

Answer:
Option E