perplexus.info :: Logic : The Party Shakers

The Party Shakers (Posted on 2003-05-22)

As the people arrived at the party, they had to greet everyone they knew in the hall with a handshake.

Show that at every moment, there were 2 people at the party who had shaken hands the same number of times.

Submitted by Fernando

Rating: 2.8333 (6 votes)

Solution: (Hide)

Trevor Leitch's solution is very clear. It's found here.

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