A sum of money doubles in $3$ years at compound interest, compounded annually. It will become $4$ times of itself in
$12$
$9$
$8$
$6$
If the difference between $S.I.$ and $C.I.$ for $2$ years on a sum of money lent at $5 \%$ is $ 6,$ then the sum is (In ₹)
A sum of money is paid back in two annual instalments of ₹ $17,640$ each, allowing $5 \%$ compound interest compounded annually. The sum borrowed was (In ₹)
The difference between simple interest and compound interest (In ₹) on ₹ $1250$ for $2$ years at $4 \%$ $p.a.$ is
Raghu invested a certain sum in Scheme $X$ for $4$ years.Scheme $X$ offers simple interest at $12$ per cent pa for the firsttwo years and compound interest (compounded annually) at $20$ per cent pa for the next two years. The total interest earned by him after $4$ years is ₹ $11016 .$ What was the sum (In ₹) invested by Raghu in Scheme $X ?$
Find the least number of complete years in which a sum of $Rs. 1500$ at $25 \%$ compound interest will be more than double.