At what rate per cent per annum will ₹ $1000$ amount to ₹ $1331$ in $3$ years? The interest is compounded yearly.

The compound interest (In ₹) on ₹ $6250$ at $12 \%$ per annum for $1$ year, compounded half-yearly is

The sum for $2$ years gives a compound interest of ₹ $3225$ at the rate of $15 \%$ per annum the amount is (In ₹) 

If the rate of interest be $4 \%$ per annum for first year, $5 \%$ per annum for second year and $6 \%$ per annum for third year, then the compound interest of $Rs. 10000$ for $3$ years will be (In $Rs.$)

What would would be the $C.I.$ obtained on an amount of $Rs. 4800$ at the rate of $5$ $p.c.p.a$ for $3$ years (In $Rs.$)?

Which information given below is sufficient to know the amount if the difference between the $C.I. \& S.I.$ for $2$ years is $18$?

($I$) The rate is same at which an amount of $Rs. 1000$ become $1120$ for $2$ years in $S.I.$

($II$) The principal given is $Rs. 2000$.