a sum of money at simple interest doubles itself in 8 years 4 mounths.In how much time will it treble itself?

A sum of money invested at a certain rate of interest doubles itself in 8 years. In how much time will it treble itself at the same interest rate ?

A sum of money invested at certain rate of interest doubles itself in 10 years. In how much time will it treble itself at the same rate ?

A sum of money lent on simple interest triples itself in 15 years and 6 months. In how many years will it be doubled?

A sum of money invested at simple interest triples itself in 8 years. How many times will it become in 20 years time?

A sum of money placed at compound interest doubles itself in 4 years. In how many years will it amount to four times itself?

A sum of money placed at compound interest doubles itself in 4 years. In how many years will it amount to eight times itself ?

A sum of money doubles itself in 12 years. In how many years would it treble itself ?

A sum of money placed at compound interest doubles itself in 3 years. In how many years will it amount to four times itself?