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: X is able to do a piece of work in 8 days and Y can do the same work in 12 days. If they can work together for 3 days, what is the fraction of work left?

 Option A: 8/5

 Option B: 6/5

 Option C: 7/5

 Option D: 3/5

 Option E: 4/5

SOLUTION: Option D

PROBLEM: Question: A man has $480 in the denominations of one-Dollar, five-Dollar notes and ten-Dollar. The number of Dollars of each denomination is equal. What is the total number of Dollar that he has ?

 Option A: 50

 Option B: 60

 Option C: 90

 Option D: 48

 Option E: 67

SOLUTION: Option C

PROBLEM: Question: The ratio of two quantities is 2 to 5. If each of the quantities is increased by 6, what is the ratio of these two new quantities?

 Option A: 2/5

 Option B: 5/8

 Option C: 7/13

 Option D: 22/25

 Option E: It cannot be determined from the information given.

SOLUTION:
Option E