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

The principal that amounts to ₹ $4913$ in $3$ years at $6 \frac{1}{4} \%$ per annum compound interest compounded annually (In ₹) is.

A sum of money placed at compound interest doubles itself in $5$ years. It will amount to eight times itself at the same rate of interest in (In $years$)

Find the ratio of $S.I. \& C.I.$ on a certain sum of money at $5 \%$ per annum for $2$ years

If the compound interest on a certain sum for $2$ years is ₹ $105$ and simple interest is ₹ $100$, then the sum (In ₹) is