Twenty metal blocks are of the same size and external appearance; some are
aluminum, and the rest are
duraluminum, which is heavier.
Using a pan balance to determine how many blocks are aluminum, what is the minimum number of weighings to be done?
(In reply to
re(4): between... by Tristan)
Tristan, my interpretation of your guess (certainly after some tests you made) in the queue was consistent with the text of the problem : "how many...", not "which was which".
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Posted by pcbouhid
on 2005-06-07 11:36:31 |
re(5): between. - to Tristan..
