## 1. When the interest is compounded annually :

## 2. When the interest is compounded annually but rates are different for different years :

## 3. When interest is compounded annually but time is a fraction :

## 4. Decreased Value or Depreciated Value :

## 5. Interest Compounded half – yearly :

## 6. Interest Compounded Quarterly :

## 7. If the rate be p % , q % and r % during the 1st , 2nd and 3rd year respectively , then

## 8. If the present population of a place is p and it increases at the rate of R % per annum , then

## 9. Population Formula :

## 10. Value of machin Formula :

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