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Treebeard's Stumper
8 May 98

A Calculator Trick

Today is the 15th Dunn Middle School Science Fair! So here's a calculator trick that uses your age as well as your address (or zip code).
   1) Enter your address93441
2) Double it186882
3) Add 5186887
4) Multiply by 509344350
5) Add your age (here 15)9344365
6) Add days in a year (365)9344730
7) Subtract 6159344115
There's your address and age again, combined as one number! Why does this work?

Answer


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Copyright © 1998 by Marc Kummel / mkummel@rain.org