MS Excel
By default Excel provides 3 worksheets. You need only two of them, how will you delete the third one?

Both of above
Right click on Sheet Tab of third sheet and choose Delete from the context menu
Click on Sheet 3 and from Edit menu choose Delete
None of above

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MS Excel
Rounding errors can occur

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

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