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after7rounds is a knockout chess tournament,the winner was announced.How many contestants were there have been in the tournament?

  • math -

    There is a progression here, 2 people played the last round, 4 the second, 8 the third, 16 on 4th, 32 on 5th, 64 on 6th, 128 on 7th.

    Between 65 and 128. Some players might have gotten "byes" in the first round.

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