The interest given or received for a certain period of time on certain amount of principal is called "Total interest".

State whether the following statement is true or false: I. The compound interest of a certain sum of money for a certain period of time at the certain rate of compound interest per annum is less than the simple interest of the same sum of money for the same period of time and at the same rate of interest. II. In the case of compound interest the quantity of principal gradually increases. III. In the case of compound interest, the rate of interest changes every year. IV. In the case of compound interest, the same quantity of interest is obtained in every year. V. In the case of compound interest the obtained interest is proportional to the period of time.

If the simple interest on a certain sum of money for 2 years is one-fifth of the principal, then find the rate of interest per annum.

If the compound interest in 1 year of a certain principal at a certain rate per annum be ₹x and the simple interest for 1 year is ₹ y, then

With a given rate of simple interest, the ratio of principal and amount for a certain period of time is 4 : 5. After 3 years, with same rate of interest, the ratio of the principal and amount becomes 5 : 7. The rate of interest is____

After a definite period of time the interest acquired is added to the principal to get the new principal. For the definite period of time, if the interest is calculated on the new principal, then the interest is called………. Interests.

SIMPLE INTEREST If interest is calculated uniformly on the original principal throughout the loan period it is called simple interest.

The time period after which interest is added each time to form a new principal is called _____.