In how many years will a sum of Rs. 3200 compounded quarterly at the rate of 50% per annum amount to Rs. 4050 ?

In how many years will a sum of Rs 26,600, interest compounded quarterly, at the rate of 25% per annum, amount to Rs 28,900?

In how many years will Rs 10,000 in compound interest at the rate of 10% per annum gets Rs 3,310 as compound interest.

In how much time will a sum of Rs 1600 amount to Rs1852.20 at 5% per annum at compound interest?

In how much time (in years) will Rs. 10000 amount to Rs. 15000 at simple interst at the rate of 5% per annum ?

In how many years will Rs 750 amount to Rs 900 at 4% per annum?

In how many years will Rs.750 amount to Rs.900 at 4% per annum?