instruction:
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.
question:
Question: There are 36 students in a certain geometry class. If one third of the students are boys and one fourth of the boys are under six feet tall, how many boys in the class are under six feet tall?

Option A: 3

Option B: 12

Option C: 18

Option D: 24

Option E: 27
answer:
Option A

question:
Question: If 12 men do a work in 80 days, in how many days will 16 men do it?

Option A: 17 days

Option B: 19 days

Option C: 15 days

Option D: 60 days

Option E: 14 days
answer:
Option D

question:
Question: A work which could be finished in 10 days was finished 3 days earlier after 10 more men joined. The number of men employed was?

Option A: 15

Option B: 20

Option C: 88

Option D: 71

Option E: 11
answer:
Option A