What you do is whisper a random number to
person 1. He adds his weight to that number and whispers the result to person
2. He and person 3 dothe same. Person 3 tells the pilot the result of his
calculation. The pilot then subtracts the original random number and comes out
with the total of the passenger's weights.


This works as long as all passengers are good at math, and there are no
telephone errors.

The likelyhood of this is not something I want to contemplate.

Jose

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(for Email, make the obvious changes in my address)