Unique Academic Board Solutions for Exercise 1: Practice Exercise

A sum of money placed at compound interest doubles in $5$ years. It will amount to $8$ times at the same rate of interest in:

The compound interest on Rs. $30,000$ at $7\%$ per annum is Rs. $4,347$. The time period (in years) is:

Abhijit borrowed Rs. $15,000$ from Nisha at compound interest rate of $12$ p.c.p.a. How much money should Abhijit pay at the end of $2$ years to settle the loan?

In what time will Rs. $1,000$ become Rs. $1,331$ at $10\%$ per annum componded annually?

If the compound interest on a sum for $2$ years at $12\frac{1}{2}\%$ per annum is Rs. $510$, the simple interest (in Rs.) on the same sum at the same rate for the same period of time is:

The difference between the simple interest and the compound interest obtained on a principal amount at $5$ p.c.p.a. after $2$ years is Rs. $35$. What is the principal amount?

A sum of money invested at compound interest amounts to Rs. $800$ in $3$ years and to Rs. $840$ in $4$ years. The rate of interest per annum is:

Sudharshan invested Rs. $15,000$ at an interest rate of $10$ p.c.p.a. for one year. If the interest is compounded every six months, what amount will Sudharshan get at the end of the year?