In how many years Rs 100000 will become Rs 1,33,100 at compound interest rate of 10% per annum?

In how many years Rs. 3000 amount to Rs. 5184 at 20% per annum compound interest ?

After 3 years,how much compound interest will be obtained on Rs 7800 at the interest rate of 5% per annum?

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 2,000 amounts to Rs. 2,420 at 10% per annum compound interest?

In how many years will a sum of Rs. 800 at 10% per annum compound interest, compounded semi-annually becomes Rs. 926.10 ?

In how many years will a sum of Rs. 800 at 10% per annum compound Interest, compounded semi-annually becomes Rs. 926.10?

A sum of Rs 10000 becomes Rs 14641 when invested at compound interest at the yearly interest rate of 20% per annum. If the compounding is done half yearly, then for how many years was the sum invested?