In what time will Rs 1000 amount to Rs 1331 at 10% per annum, compound interest?

In what time will Rs 1000 amount to Rs 1331 at 10% per annum, compounded annually?

In what time will Rs 1000 amount to Rs 1331 at 10% per annum, compounded annually?

In what time will Rs. 1000 amount to Rs. 1331 at 20% per annum, compounded half yearly?

In what time will * 1000 amount to 1331 at 10% per annum compounded annually?

In how much time would Rs 5000 amount to Rs 6655 at 10% per annum compound interest?

In how much time would Rs 5000 amount to Rs 6655 at 10% per annum compound interest?

In what time Rs.8000 will amount to Rs.9261 at 10% per annum compound interest, when the interest is compounded half-yearly?