How do you change all positive numbers in a sheet to negatives?

In Sheet1, column A is January's sales numbers. In Sheet2, column A is February's sales numbers. Which equation on Sheet 3 totals both columns, in row 5?

To insert a character that is not part of an alphabetic font sent (such as copyright ©) use the:

Which worksheet function returns the average of selected database entries?

Which function would you use to find the largest number of a selected range?

How can you delete a worksheet?

When using Goal Seek, you can find a target result by varying _ at most.

Which format will display the value 27,500,000 as 27.5?

What is the best way to activate the Excel Help system?

You need to add a line chart showing a sales trends over the last 12 months and you have only a little space to work with. How can you convey the required information within a single cell?

When editing a cell, what do you press to cycle between relative, mixed, and absolute cell references?