 Against the computer
 Against the computer 
Nim's game
Aim : The winner is the person who picks up the last pencil.
Rules : You can remove either 1, 2, or 3 pencils each go.
 Against the computer
 Against the computer Aim : The winner is the person who picks up the last pencil.
Rules : You can remove either 1, 2, or 3 pencils each go.