.A sum of money becomes `3`times in `12`years.In how many years will it become `5` times at the same rate of simple interest?

If a sum of money becomes 3 times in 12 years then in how many years it will become 5 times at the same rate of simple interest?

A sum of money becomes doubles in 10 year In how many years it will be 3 times at the same rate of simple interest ?

A sum of money becomes 4 times of itself in 6 years at C.I. In how many years will it become 8 times.

A sum of money becomes 3 times in 5 years at simple interest. In how many years will the same sum become 6 times at the same rate of simple interest?

A sum of money becomes 8 times of itself in 12 years at C.I. In how many years it will become 16 times of itself.

A sum of money invested at compound interest doubles itself in six years. In how many years will it become 64 times itself at the same rate of compound interest?