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: Thoughts, spoiler?
I tend to do that when I'm in a hurry.
Posted by Erik O.
on 2005-06-06 15:42:26