Calculate Your Age, the Hard Way

Browsing around in my blog links, I found this:

Your Age By Diner & Restaurant Math

Try it for yourself, and then:

  • Can you explain how it works?
    You will have to use a little algebra. If you were at my pre-algebra workshop, this will be like the “Choose a number” problem.
  • Can you explain why this puzzle will not work next year?
    What would you change to make it work in some year other than 2007?
  • Can you make up a problem like this?
    Or can your students?

And if you get stumped, the answer is here.

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