- Two numbers can be connected by a line if their sum is less than fifteen and that line does not touch any other numbers.- The properly formed triangles will disappear from the board.- The player advances to the next level if there are no numbers left on the board, if they fail, they can replay that round one more time.- The player has to go back to the lower level or to start a new game if their two attempts at a level ( including REPLAY) are unsuccessful.- The game ends when the player accomplishes the eighth level.* Trios of fifteen: (1,5,9);(1,6,8);(1,7,7);(2,4,9);(2,5,8);(2,6,7);(3,3,9);(3,4,8);(3,5,7),(3,6,6);(4,4,7);(4,5,6);(5,5,5)
Number Triangle: Make 15
