On a certain sum of money, the simple interest for $2$ years is ₹ $200$ at the rate of $7 \%$ per annum. Find the difference in $C I$ and $S I .$ (In ₹)

Find the least number of complete years in which a sum of $Rs. 1500$ at $25 \%$ compound interest will be more than double.

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 ₹)

What will be the difference between simple and compound interest (In ₹) @ $10 \%$ per annum on a sum of ₹ $1000$ after $4$ years?

Sam invested ₹ $15000$ at $10 \%$ per annum for one year. If the interest is compounded halfyearly, then the amount (In ₹) received by Sam at the end of the year will be

A certain sum of money at compound interest grows up to ₹ $12960$ in $2$ years and up to ₹ $13176$ in $3$ years. Find the rate per cent per annum.