🚀 go-pugleaf

Hi there!I just joined your newsgroup a few days ago and I had fun to solve the
parachutist and the handshake enigmas.I've got some, I just hope that they were
never asked before.So, here's the first one:

You have 10 vending machines to fill out with chocolate bars. In fact, after finishing
to put the chocolate, you remember that you had 9 boxes of chocolate bars of 100g. and
one box of bars of 90g and you gotta know in which machine you put those of 90g. You  
cannot tell just by looking on the paper on the bar if it has 90 or 100 g. But, beside the 10 
vending machine, you have an electronic weighing machine. When you put a quarter in it
, it tells you the weight (it makes only one measure). The problem is that you have only a 
quarter (only one try) and you gotta know , just by one try, in which machine you put 
the chocolate bars of 90g. You don't have access to the money of the vending machines.
You can weigh as much bars as you want, but you can take one measure.    

How can you do this (it's mathematic)?

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Marco Bouchard                    Soyons EXPOS-itifs!
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