You have 4 weights weighing 2,3,5 and 7 pounds. The problem is none of them are marked. What is the fewest number of weighings you need using a balance scale figure out which weights are which?
(In reply to a computerized start
Actually, since we don't need to predefine our weighings, and subsequent weighings can depend on the outcome of previous ones, we do not need to select beforehand a set of rows to use, with a unique signature.
Posted by Charlie
on 2004-07-25 12:18:58