Here are the rules of the game from Multiplication.com's blog.
It is played just like Jenga; however, a multiplication fact is placed on a side of a game piece.
When setting up the tower, make sure to place the multiplication fact face down so no player can see the probem.
When a piece is chosen the player must answer the question correctly to keep the tile. If answer incorrectly, the question is asked to the other player and if answered correctly - they get to keep the tile.
The game ends when the tower falls and whoever has the most tile pieces is the winner.
See the embedded 1 minute and 20 second YouTube video below.
Of course this could be altered to fit whatever facts you are currently working on. There are so many possibilities with this.