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: The difference of two numbers is 1565. On dividing the larger number by the smaller, we get 6 as quotient and the 15 as remainder. What is the smaller number ?

Option A: A

Option B: B

Option C: C

Option D: D

Option E: E
Option E

Question: A man took a loan at rate of 12% per annum simple interest. After 3 years he had to pay 4320 interest. The principal amount borrowed by him was.

Option A: Rs 14000

Option B: Rs 15000

Option C: Rs 12000

Option D: Rs 17000

Option E: None of these
Option C

Question: I bought two books; for Rs. 480. I sold one at a gain of 10% and other at a gain of 20% and then I found each book was sold at the same price. Find the cost of the book sold at a lesser gain ?

Option A: A

Option B: B

Option C: C

Option D: D

Option E: E
Option D