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: (3x + 1) (2x - 5) = ax^2 + kx + n . What is the value of a - n + k ?

 Option A: 5

 Option B: 8

 Option C: 9

 Option D: 14

 Option E: 11
answer:
Option D


question:
Question: Rs.800 amounts to Rs.920 in 3 years at simple interest. If the interest is increased by 3%, it would amount to how much?

 Option A: Rs.1056

 Option B: Rs.1112

 Option C: Rs.1182

 Option D: Rs.992

 Option E: Rs.702
answer:
Option D


question:
Question: The percentage increase in the area of a rectangle, if each of its sides is increased by 20% is:

 Option A: 32%

 Option B: 34%

 Option C: 42%

 Option D: 44%

 Option E: 54%
answer:

Option D