Ctrl + Numbers

Ctrl + 0	Hides the columns in the current selection.
Ctrl + 1	Displays the Format Cells dialog box (not using the keypad).
Ctrl + 2	Toggles bold on the current selection.
Ctrl + 3	Toggles italics on the current selection.
Ctrl + 4	Toggles underlying on the current selection.
Ctrl + 5	Toggles the strikethrough of text on the current selection.
Ctrl + 6	Toggles between showing all objects or showing no objects in the active workbook. This option can be found under (Advanced, Display options for this workbook - For objects show).
Ctrl + 7	Allows you to move/reposition the entire Excel window using the arrow keys.
Ctrl + 8	Toggles the display of Outline Symbols on the active worksheet.
Ctrl + 9	Hides the rows in the current selection.
Ctrl + Shift + 0	Unhides the columns in the current selection.
Ctrl + Shift + 1	Applies the Comma separated format "#,##0.00" to the selection.
Ctrl + Shift + 2	Enters the value from the cell directly above into the active cell.
Ctrl + Shift + 4	Applies the Currency format "£#,##0.00" to the selection.
Ctrl + Shift + 5	Applies the Percentage format "0%" to the selection.
Ctrl + Shift + 6	Applies the Exponential format "#,##E+02" to the selection.
Ctrl + Shift + 7	Applies a thin black border around the outside of the selected cells.
Ctrl + Shift + 8	Selects the Current Region (surrounded by blank rows and columns).
Ctrl + Shift + 9	Unhides the rows in the current selection.

Ctrl + 0 Hides the columns in the current selection.
Ctrl + 1 Displays the Format Cells dialog box (not using the keypad).
Ctrl + 2 Toggles bold on the current selection.
Ctrl + 3 Toggles italics on the current selection.
Ctrl + 4 Toggles underlying on the current selection.
Ctrl + 5 Toggles the strikethrough of text on the current selection.
Ctrl + 6 Toggles between showing all objects or showing no objects in the active workbook. This option can be found under (Advanced, Display options for this workbook - For objects show).
Ctrl + 7 Allows you to move/reposition the entire Excel window using the arrow keys.
Ctrl + 8 Toggles the display of Outline Symbols on the active worksheet.
Ctrl + 9 Hides the rows in the current selection.
Ctrl + Shift + 0 Unhides the columns in the current selection.
Ctrl + Shift + 1 Applies the Comma separated format "#,##0.00" to the selection.
Ctrl + Shift + 2 Enters the value from the cell directly above into the active cell.
Ctrl + Shift + 4 Applies the Currency format "£#,##0.00" to the selection.
Ctrl + Shift + 5 Applies the Percentage format "0%" to the selection.
Ctrl + Shift + 6 Applies the Exponential format "#,##E+02" to the selection.
Ctrl + Shift + 7 Applies a thin black border around the outside of the selected cells.
Ctrl + Shift + 8 Selects the Current Region (surrounded by blank rows and columns).
Ctrl + Shift + 9 Unhides the rows in the current selection.