A certain sum will amount to ₹ $12,100$ in $2$ years at $10 \%$ per annum of compound interest, interest being compounded annually. The sum is (In ₹)

In how many years will a sum of ₹ $800$ at $10 \%$ per annum compound interest, compounded semiannually becomes ₹ $926.10$?

Albert invested an amount of ₹ $8000$ in a fixed deposit scheme for $2$ years at compound interest rate of $5 \%$ per annum. How much amount (In ₹) will Albert get on maturity of the fixed deposit?

A sum of money at compound interest amounts to thrice itself in $3$ years. In how many years will it be $9$ times itself?

The sample interest on a sum of money for $3$ years is ₹ $240$ and the compound interest on the same sum, at the same rate for $2$ years is ₹ $170 .$ The rate of interest is (In $\%$)

If the compound interest on a sum for $2$ years at $12 \frac{1}{2} \%$ per cent is ₹ $510$, the simple interest (In ₹) on the same sum at the same rate for same period of time is