Use the prime numbers to break down the non-prime numbers and to clear off the same numbered primes.
Examples:
If you select a 5 tile and a 10 tile – The result would be a 2 tile.
If you select a 5 tile and another 5 tile (or any other same numbered Prime Tile) – you would clear both tiles. So the following combinations would remove both tiles from the board – (2,2) (3,3) (5,5) (7,7)
However, if you select two tiles that are not factors of each other, those two tiles will disappear, and two new tiles will be added to the board. So for instance, if you selected a 4 and a 10 or a 5 and a 7, those two tiles would be removed, and two new ones would appear. HINT - this could be used as a strategy to help get more favorable tiles.
Play until all tiles have been cleared (the goal is to clear the board).
The primes in this game are 2, 3, 5, and 7.