If the interest rate is compounded annually, a sum of money becomes 8 times its value in 3 years. how many

At what rate per cent compound interest does a sum of money become 16 times in 4 years?

A sum of money becomes four times itself in 5 years at a certain rate of interest, compounded annually. In how many years will it become 16 times itself at the same rate of interest?

A certain sum triples in 4 years at compound interest, interest being compounded annually. In how many years would it become 27 times itself ?

A finance company declares that, at a certain compound interest rate, a sum of money deposited by anyone will become 8 times in 3 years. If the same amount is deposited at the same compound rate of interest, then in how many years will it become 16 times? (a) 4 years (b) 5 years (c) 6 years (d) 7 years

A certain sum quadruples in 3 years at compound interest, interest being compounded annually. In how may years will it become 64 times itself ?

A sum becomes 5 times of itself in 3 years at compound interest (interest is compounded annually). In how many years will the sum becomes 125 times of itself?