List of top Arithmetic and Mental Ability Questions on Simple Interest asked in KLEE

A sum of rupees fetches simple interest Rs.2400 for 2 years. If the rate of interest is 12%, then the principal amount is
Rs. 1000 is deposited in a bank at the rate of 7% simple interest for 5 years. The maturity amount is:
The difference of simple interest from two banks for Rs. 1000 in 2 years is Rs 20. Find the difference in rates of interest.
A certain sum becomes 8 fold in 15 years at simple interest. What will be the rate of interest?