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Pyramid of Pennies

by Dan Meyer


Act One

  • Dan Meyer

    Dan Meyer

    March 12, 2013

    How many pennies is that?

  • 1.

    What's a guess you know is too high?

  • 2.

    What's a guess you know is too low?

Act Two

Act Three


  • 4.

    Marcelos Bezos is now trying to make a pyramid out of 1 billion pennies. How big would that be? Where should be build it?

  • 5.

    Each stack has 13 pennies which is a strange number to choose. Why do you think Marcelo Bezos chose it? (Hint: Not out of superstition.)

  • Teacher note
    Give groups of students a dollar in pennies. See how fast they can assemble seven stacks of thirteen pennies. Then ask them to use that as a sample to determine how long it would take them to build the entire pyramid.
  • 6.

    How fast could you make the pyramid Marcelos Bezos made?

  • 7.

    How heavy is the pyramid?

  • 8.

    If Bezos now wanted to add more levels to the pyramid, what's the best way for him to do that?

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