Pen Games: What is a pen game? and 2 pen games 'Truth and a Lie' and 'Score'

What is a pen game?
A pen game is any form of gambling game which involves players writing down something on a card or piece of paper and laying the card or paper face down to keep the thing hidden. 

 

The Pen game of Truth and A Lie
Truth and A Lie is a pen game for more than 2 players.
All the players write one single digit number upon a card and lay the card face down so that other players can't see the number they have written.
Each player then says two numbers.
One of the numbers they say is the number they have written down, 'The True Number'; the other is a made up number 'The Lie Number'.
Obviously the players don't know which of the two numbers a player says is the one they have written down.
Each player then picks one of the other players to play their number against.
Once players have picked their opponent, they turn their cards over and show the number they wrote down to each other.
The player with the highest number wins.
The number 1 outranks the number 9 but is lower than all other numbers.

 

The Pen game of Score
Score is a pen game for 2 or more players
Players each write down a single digit number on a card and then either draw a line through it or don't draw a line through it.
They then place their cards face down infront of them and turn them over.
If neither of the players have drawn a line through their number then, simply, the highest number wins.
If both players have drawn a line through their number then, regardless of who has the highest or lowest number, its a draw and no one wins.
If only the person with the highest number has drawn a line through their number, they win double.
If only the person with the lowest number has drawn a line through their number, then the lowest number wins.