For this game you will need one deck of cards withe face cards and 10s removed. The Ace card is worth one.
To play, split the deck of cards between you and your mentee. Each person will then simultaneously flip over their top 3 cards. Make two of the cards into a 2-digit number and subtract the third. Players may move the cards and place them in any position of the number the wish.
Each player subtracts the third number from the 2 digit number. The person with the greatest difference wins all six cards. Play until all of the cards are gone. The person with the most cards wins the game!
For example:
Player 1: 76-2 = 75 Player 2: 95-3= 92
Player 2 wins this battle and gets to keep all 6 cards!