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.

[Q]: Question: The fourth proportional to 12, 14 and 12 is?

 Option A: 14

 Option B: 66

 Option C: 77

 Option D: 88

 Option E: 99
[A]: Option A


[Q]: Question: On dividing a number by 7, we get 3 as quotient and 0 as remainder. On dividing the same number by 3, what will be the remainder?

 Option A: 1

 Option B: 2

 Option C: 3

 Option D: 0

 Option E: 4
[A]: Option D


[Q]: Question: A is twice as fast as B. If B alone can do a piece of work in 18 days, in what time can A and B together complete the work?

 Option A: 10

 Option B: 16

 Option C: 18

 Option D: 6

 Option E: 12
[A]:
Option D