There are 9 balls and of these one is a bit heavier than the others. But all look equally big. How is it possible to identify this with the condition that one can use the pair of scales only twice?
There are 9 balls and of these one is a bit heavier than the others. But all look equally big. How is it possible to identify this with the condition that one can use the pair of scales only twice?
check out this...
http://www.geekinterview.com/talk/73...t-finding.html
-- James