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: 3 buffaloes eat as much as 4 cows or 2 oxen. At a farm there are 15 buffaloes, 8 oxen and 24 cows. The fodder for these cattle is available for 24days. If 8 more cows & 9 more buffaloes are brought in, how long will the fodder last?

 Option A: 8

 Option B: 10

 Option C: 12

 Option D: 18

 Option E: 20
[A]: Option D


[Q]: Question: Rahim bought 4 pillows with the average cost of $5. If Rahim also buys the fifth pillow with the price of $ 10, what is the average (arithmetic mean) price of those 5 pillows?

 Option A: $6

 Option B: $5

 Option C: $5.5

 Option D: $6.5

 Option E: $7
[A]: Option A


[Q]: Question: If 6 is one solution of the equation x^2 + 3x + k = 10, where k is a constant, what is the other solution?

 Option A:  -7

 Option B:  -4

 Option C:  -3

 Option D:  -9

 Option E:  6
[A]:
Option D