A sum becomes 1.6 times of itself in five years at simple rate of interest. Find rate of interest per annum?

A sum becomes five times of itself in 8 years at simple interest. What is the rate of interest per annum?

A sum of money becomes eight times of itself in 3 years at compound interest. The rate of interest per annum is

A sum of money becomes eight times of itself in 3 years at compound interest. The rate of interest per annum is

A sum becomes three times of itself in 10 years at the rate of simple interest. What is the rate of interest per annum?

A sum becomes 10/9 times itself in 1 yr Find the rate of simple interest

A sum becomes 1.69 times of itself in 2 years when invested at compound interest. What is the per annum rate of interest (in percentage)?

A sum of money becomes (41)/(40) of itself in 1/4 year at a certain rate of simple interest. The rate of interest per annum is :

A sum becomes 14 times of itself in 15 years at the rate of simple interest per annum. In how many years will the sum becomes 92 times of itself?