NumPad

The numeric pad on most keyboards:

7 8 9
 \|/
4-5-6
 /|\
1 2 3

On US and UK keyboards (not sure about others), 7 doubles up as 'Home', 1 as 'End', 9 as 'Page Up' and 3 as 'Page Down', while 8, 4, 6 and 2 double up as the arrow keys Up, Left, Right and Down.

The 5 key usually means to stay in the same place.