The game of Tic-Tac-Toe is being played between two players. Only the last mark to be placed in the game as shown.
Who will win the game, O or X? Can you tell which was the sixth mark and at which position? Do explain your answer.
Assume that both the players are intelligent enough.
O will win the game. The sixth mark was X in square 9.
The 7th mark must be placed in square 5 which is the win situation for both X and O. Hence, the 6th mark must be placed in a line already containing two of the opponents marks. There are two such possibilities - the 6th mark would have been either O in square 7 or X in square 9.
As we know both the players are intelligent enough, the 6th mark could not be O in square 7. Instead, he would have placed O in square 5 and would have won.
Hence, the sixth mark must be X placed in square 9. And the seventh mark will be O. Thus O will win the game.
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