A sum of money doubles itself at compound interest in 10 years.In how many years will it become eight times?

If the sum of money doubles itself at compound interest in 15 years.In how many years will it become eight times?

A sum of money doubles itself at compound interest in 15 years in how many years it will become eight times?

A sum of money doubles itself at compound interest in 4 years. In how many years will it become 8 times?

A sum of money double itself at compound intrest I 15 years.In how many years it will become eight times?

A sum of money triples itself in 3 years at compound interest. In how many years will it become 9 times itself ?

A sum of money becomes just double at compound interest in 5 years. In how many years it will be 8 times itself?

A certain sum of money triples itself in 6 years at compound interest. In how many years will it become 27 times at the same rate of compound interest?