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MATH / In a round-robin tournament with n teams, the number of games that must be played is (n²−n)/2. How many teams are in a round-robin tournament in which 55 games are played?

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problem

In a round-robin tournament with nn teams, the number of games that must be played is (n2−n)/2(n^2-n)/2. How many teams are in a round-robin tournament in which 55 games are played?
Plain-text mathematical notation (without MathML)
In a round-robin tournament with n teams, the number of games that must be played is (n²−n)/2. How many teams are in a round-robin tournament in which 55 games are played?
Original LaTeX notation
In a round-robin tournament with $n$ teams, the number of games that must be played is $(n^2-n)/2$. How many teams are in a round-robin tournament in which 55 games are played?

level

Level 2

type

Algebra

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Source and history

task_id
b8e035d4-9919-575b-bc4d-ca22895ec667
task_key
algebra--test--b8e035d4-9919-575b-bc4d-ca22895ec667
task_revision_id
1
config / split
algebra / test

Official source

initial import