The difference between the compound interest and simple interest on a certain sum at $5 \%$ for $2$ years is ₹ $1.50$. The sum is (In ₹) 

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 $\%$)

A man borrows ₹ $4000$ from a bank at $7 \frac{1}{2} \%$ compound interest. At the end of every year he pays ₹ $1500$ as part repayment of loan and interest. How much does he still owe to the bank after three such instalments (In ₹) ?

₹ $800$ at $5 \%$ per annum compound interest amount to $₹ 882$ in (In $years$)

If the compound interest on a certain sum for $2$ years is ₹ $60.60$ and the simple interest is ₹ $60$, then the rate of interest per annum (In $\%$) is