Is there a person on Earth who has the same exact number of body hairs as you? The video describes a process using the Pigeonhole Principle to prove that this is definitely possible. The film goes on to consider other examples and variations of the Pigeonhole Principle.

Concepts

probability, estimation

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Additional Tags

math

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Instructional Ideas

• Have the class come up with their own applications or examples of the Pigeonhole Principle
• See if it is possible to get the book mentioned in the video

Classroom Considerations

• Note that the world population statistic quoted in the video is no longer current

• This video is hosted on YouTube

Pros

• Odd question will pique curiosity
• Interesting animations and graphics

Cons

• None