Ctrl + Letters

Ctrl + A	Selects the entire worksheet, or the current region if the active cell contains a value, or the whole table (excluding heading) if the active cell is in a table. It can also display the Function Arguments dialog box if you have typed a function.
Ctrl + A, A	Selects the whole worksheet if the active cell contains a value.
Ctrl + B	Toggles bold on the current selection.
Ctrl + C	Copies the current selection to the clipboard.
Ctrl + D	Enters the value from the cell directly above into the active cell.
Ctrl + E	Populates the selected cells using a Flash Fill recognised pattern.
Ctrl + F	Displays the Find tab of the Find and Replace dialog box.
Ctrl + G	Displays the GoTo dialog box.
Ctrl + H	Displays the Replace tab of the Find and Replace dialog box.
Ctrl + I	Toggles italics on the current selection.
Ctrl + K	Displays the Insert Hyperlink dialog box.
Ctrl + L	Displays the Create Table dialog box.
Ctrl + N	Creates a New (default) workbook.
Ctrl + O	Displays the Open Options on the File tab.
Ctrl + P	Displays the Print Options on the File tab.
Ctrl + Q	Displays the Quick Analysis smart tag.
Ctrl + R	Enters the value from the cell directly to the left into the active cell.
Ctrl + S	Saves. Displays the Save As Options on the File tab when its a new workbook.
Ctrl + T	Displays the Create Table dialog box.
Ctrl + U	Toggles underlining on the current selection.
Ctrl + V	Pastes the entry from the clipboard. You can also use Enter to paste the entry.
Ctrl + W	Closes the active workbook or window (saving first).
Ctrl + X	Cuts the current selection to the clipboard.
Ctrl + Y	Redo the last Excel operation. This can be used to redo multiple steps. This can also be used to repeat applied formatting.
Ctrl + Z	Undo the last Excel operation. This can be used to undo multiple steps.

Ctrl + A Selects the entire worksheet, or the current region if the active cell contains a value, or the whole table (excluding heading) if the active cell is in a table. It can also display the Function Arguments dialog box if you have typed a function.
Ctrl + A, A Selects the whole worksheet if the active cell contains a value.
Ctrl + B Toggles bold on the current selection.
Ctrl + C Copies the current selection to the clipboard.
Ctrl + D Enters the value from the cell directly above into the active cell.
Ctrl + E Populates the selected cells using a Flash Fill recognised pattern.
Ctrl + F Displays the Find tab of the Find and Replace dialog box.
Ctrl + G Displays the GoTo dialog box.
Ctrl + H Displays the Replace tab of the Find and Replace dialog box.
Ctrl + I Toggles italics on the current selection.
Ctrl + K Displays the Insert Hyperlink dialog box.
Ctrl + L Displays the Create Table dialog box.
Ctrl + N Creates a New (default) workbook.
Ctrl + O Displays the Open Options on the File tab.
Ctrl + P Displays the Print Options on the File tab.
Ctrl + Q Displays the Quick Analysis smart tag.
Ctrl + R Enters the value from the cell directly to the left into the active cell.
Ctrl + S Saves. Displays the Save As Options on the File tab when its a new workbook.
Ctrl + T Displays the Create Table dialog box.
Ctrl + U Toggles underlining on the current selection.
Ctrl + V Pastes the entry from the clipboard. You can also use Enter to paste the entry.
Ctrl + W Closes the active workbook or window (saving first).
Ctrl + X Cuts the current selection to the clipboard.
Ctrl + Y Redo the last Excel operation. This can be used to redo multiple steps. This can also be used to repeat applied formatting.
Ctrl + Z Undo the last Excel operation. This can be used to undo multiple steps.