You have ten coins, but two are fake, and weigh a little less. How many times do you have to use a two arm scale, in order to pick out the two fakes?
(In reply to Guess
Actually, I correct myself, supposing that these two coins that pull on
the first draw are not the fakes, then you draw a fake, you would still
have to find the other fake. That would take at least one more
turn, so minimum is 3 weighings.
Posted by David
on 2005-03-28 05:37:24