Dragan,
>You can google "six generals" just like I can.
OK, I googled "six generals", and I found this, which I bet you'll like it :D
"Six generals want to lock a top secret safe with a number of different locks. Each general will be given keys to some of these locks. How many locks are required and how many keys must each general have so that, Any four generals (out of the six) should be able to open the safe?"
I do not know if there was a solution posted, but, if you like, you can post yours here and here
http://www.wilmott.com/messageview.cfm?catid=26&threadid=22103 <g>
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