In how many years Rs 100 will produce the same interest at 5% as Rs. 200 produce in 2 years at 10%
Answers:  A) 8  B) 10  C) 9  D) 12  E) 11

Rationale: "explanation : clue : firstly we need to calculate the si with prinical 200 , time 2 years and rate 10 % , it will be rs . 40 then we can get the time as time = ( 100 * 40 ) / ( 100 * 5 ) = 8 option a"
Answer: A