The object of this game is to form rows, columns, or diagonals that add up to 15.
• Sheet of unlined paper
• Pen or marker
• Ruler
• Nine counters, numbered from one to nine (see Magic Square Tic-Tac-Toe)
Draw the diagram for Tic-Tac-Toe. Figure 15
1. Player One takes the five odd-numbered counters: 1, 3, 5, 7, and 9. Player Two takes the four even-numbered counters: 2, 4, 6, and 8.
2. The players take turns placing a counter on the game board. All nine counters are used. The object is to make a row of three counters that has a sum of 15. A row may contain both odd and even numbers.
3. A player scores one point for each row he or she completes. A player can sometimes make two or even three rows in one move.
4. The player with more points is the winner. Figure 16a and Figure 16b
For the next game, the players exchange counters.
Figure 15
Counters and diagram for number Tic-Tac-Toe
Figure 16a
a. Player One gets ready to move
b. Player One has made two rows in one move, and earns two points
Figure 16b
