Without using the mouse or the arrow keys, what is the fastest way of getting to cell A1 in a spreadsheet?

holding on the "Ctrl Key" then pressing the "Home Key".

press ctrl+Homeor type  on  name box A1 

PRESS BOTH CTRL AND HOME KEYS AT THE SAME TIME

Ctrl key +Home Pressing or typing ON Name Box A1

Type A1 on the name box or press Ctrl+Home.

PRESSING AND HOLDING THE Ctrl KEY + Home KEY

press down control key and home key

Press ctrl+home to get inot cell A1

press "Ctrl" Key + "Home" keys

Just press the Ctrl key+Home key

By holding Control key and home key you can get to cell no. A1 directly. Means keyboard is faster than using mouse.