MS Excel
A circular reference is

Geometric modeling tool
Always erroneous
A cell that points to a drawing object
A formula that either directly or indirectly depends on itself

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MS Excel
Rounding errors can occur

When you use multiplication, division, or exponentiation in a formula
When you use addition and subtraction in a formula
When you show the results of formulas with different decimal places that the calculated results
Because excel uses hidden decimal places in computation

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MS Excel
Right clicking something in Excel:

Deletes the object
Nothing the right mouse button is there for left handed people
Opens a shortcut menu listing everything you can do to the object
Selects the object

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MS Excel
The Name box on to the left of formula bar

Shows the name of cell or range currently working on
None of the listed here
Shows the name of workbook currently working on
Shows the name of worksheet currently working on

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