What You Do:
- Announce to both players that, in the first round, all cards are positive integers.
- Have one of the players shuffle the cards.
- Deal three cards to each player. The first and third card should be dealt face up and the middle card should be dealt face down. The middle, face-down card is the mystery card.
- Have the players discuss probability as it relates to the mystery card. What are the chances that it will it be a value between the two other cards?
- Each player should predict if his mystery card is higher or lower in value than the two face-up cards.
- If he guesses correctly, the player keeps the cards. If he guesses incorrectly, he must return his cards to the bottom of the deck.
- Continue dealing the cards until one player has amassed all of them.
Variation: Make this game more challenging by having the red cards represent negative integers and the black cards represent positive integers.