Formula mistake may occur in Excel

Errors	Notification
#VALUE	This error value is displayed if you use a cell reference in a mathematical formula that contains a piece of text. This error also appears if a selection is used without specifying a function.
#DIV/0!	This error value is displayed if you divide a value by zero (O).
#REF!	This error value is displayed if cell reference does not exist that is used in the formula.
#N/A!	This error value is displayed if value is not available or Excel Cannot Find the required Value
Circular	The circular reference is a special error message displayed in
Reference	form of dialog box. This error message occurs when a formula uses its own result as one of its reference or arguments. This error message is also indicated in the status bar showing the cell address containing the error.