In what time will $₹ 15625$ amount to $₹ 17576$ at $4\%$ per annum compound interest?

The money borrowed (lent or invested) is called _____ .

The additional money paid by the borrower to the moneylender in lieu of the money used is called _____.

Fill in the blanks:

In simple interest, the principal remains _____ (increases/decreases/constant) for the whole loan period.

In compound interest the _____ goes on changing every conversion period.

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

If the interest is compounded semi-annually then semi-annually rate is _____ of annual rate.

The interest paid by the banks, post offices, insurance companies is simple interest.