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: The original price of a shirt was $20. It was decreased to $15 . What is the percent decrease of the price of this shirt.

 Option A: 25%

 Option B: 35%

 Option C: 45%

 Option D: 55%

 Option E: 65%
answer:
Option A


question:
Question: A cab driver 5days income was $25, $50, $60, $65 , $70. Then his average income is?

 Option A: A

 Option B: B

 Option C: C

 Option D: D

 Option E: E
answer:
Option B


question:
Question: The perimeter of one square is 48 cm and that of another is 20 cm. Find the perimeter and the diagonal of a square which is equal in area to these two combined?

 Option A: 13√7

 Option B: 13√2

 Option C: 13√8

 Option D: 13√9

 Option E: 12√2
answer:

Option B