The difference between the simple interest and the compound interest on a certain amount at 5% for two years is 25, what is the amount?

 If 64 amount to 83.20 in 2 years what will ₹ 86 amount to in 4 years at the same rate percent per annum? 

What sum of money must be given as simple interest for six months at 4% per annum in order to earn 150 interest?

What sum will amount to ₹ 7000 in 5 years at $$3{1\over3}\%$$ simple interest ? 

If the simple interest for 6 years be equal to 30% of the principal, it will be equal to the principal after 

A person deposited ₹15,600 in a fixed deposit at 10% per annum simple interest. After every second year he adds his interest earned to the principal. The interest at the end of 4 years is:

Rinky borrowed a certain sum of money from Kajal under the following repayment scheme based on simple interest. 8% p.a. for the initial 2 years, 9.5% p.a. for the next 4 years, 11% p.a. for the next 2 years, 12% p.a. after the first 8 years. Find the amount which a sum of Rs. 9000 taken for 12 years becomes at the end of 12 years?

What would be the simple interest obtained on an amount of `6,535 at the rate of 10 % p.a. (percent per annum) after 6 years?