Friends at a party: Difference between revisions
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Oscarlevin (talk | contribs) Created page with '==Puzzle== An extremely popular mathematician threw a party. Including himself, there were 15 people at the party. Must there have been two people there with the same number o…' |
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==Puzzle== | ==Puzzle== | ||
An extremely popular mathematician threw a party. Including himself, there were 15 people at the party. Must there have been two people there with the same number of | An extremely popular mathematician threw a party. Including himself, there were 15 people at the party. Must there have been two people there with the same number of friends? Explain. | ||
[[Category: Graph theory]] | [[Category: Graph theory]] | ||
[[Category: Pigeonhole theorem]] | [[Category: Pigeonhole theorem]] | ||
Revision as of 13:03, 30 March 2010
Puzzle
An extremely popular mathematician threw a party. Including himself, there were 15 people at the party. Must there have been two people there with the same number of friends? Explain.