Five index cards with series of numbers printed on them, as used in Birthday Numbers team puzzle

Birthday Numbers

Unique mathematical puzzle to challenge small teams.

  • Promotes lateral-thinking
  • Inspires creativity
  • Simple, but not easy
  • Powerful metaphor
  • Great time-filler

Step-by-Step Instructions

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Add your Comments...

Have you played this activity? What worked, what didn't work? What type of group? Do you have useful advice for other users? Do you know a fun variation?

Comments (3)

  1. jeWElle de Mesa

    ooooops! i wonnnnnder, what are the odds that it will be magically recalled at some point. in some way, shape or form. 😉

  2. jeWElle de Mesa

    sooooo……. mr. collard – what’s the other solution?!?


    • Mark

      If you are referring to the alternative, mathematical solution which explains why certain numbers appear on certain cards, I have no clue JeWeL. It was once explained to me, and I forgot it three seconds later 🙂

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